Depreciation with Prime
hi,
I made a program to estimate the depreciation (for Italian people: "ammortamento") of assets, giving cost of fix assets, residual (salvage) value and number of years, with the methods of "straight line", "declining balance" and "Sum of year digits" (see here –and in the HP 12C– for theory).
The values of depreciations tables are exported in three matrices.
If you want, please, help to make it more helpful (and nice) 
For example, I wonder if there is a way, for "input" to print a label, instead of a textbox field...
I'd also add a line with labels in the matrices (like in a spreadsheet) to help with the columns.
Any hints and advice are welcome!
Salvo
EDIT May, 27: Added a function to help with labels for the tables; corrected a bug
Code:
export D_SLmat:=[0,0,0];
export D_DBmat:=[0,0,0,0,0];
export D_SOYDmat:=[0,0,0,0,0,0];
export D_DBendRate:=0;
smenu();
sl();
dbal();
soyd();
ins_data();
cfa; rv; ula;
EXPORT Depreciation()
BEGIN
ins_data();
// Depreciation with method of Straight Line, Declining Balance, Sum of the Year Digits
smenu();
END;
ins_data()
BEGIN
local mt, lab1:=" ", lab2:=" ";
input ({ {cfa, [0], {15,15,1}},
{rv, [0], {50,15,1}}, {ula, [0], {80,15,1}},
{mt, {"SL ", "DB ", "SOYD"}, {75,20,3}}, {lab1,[2], {15, 80, 4}}, {lab2,[2], {15, 80, 5}} },
"Depreciation",
{"Cost", "ResVal", "Years", "Method", "SL DB", "SOYD" },
{"Cost of fixed asset", "Residual value",
"Useful life of asset (year)", "Method of depreciation", "Methods to calculate depreciation","Methods to calculate depreciation" },
{0,0,0,0, "", ""},
{1000, 100, 5, 3, "Straight Line - Declining Balance", "Sum of the Year Digits"} );
CASE
IF mt==1 THEN sl(); END;
IF mt==2 THEN dbal(); END;
IF mt==3 THEN soyd(); END;
DEFAULT
END; // case
RETURN;
END;
EXPORT labelmat()
BEGIN
RECT_P();
TEXTOUT_P("Labels of the tables", 85, 10, 5, RGB(255, 0, 0));
LINE_P(10,35,300,35, RGB(0,0,255));
TEXTOUT_P("SL: Straight Line method", 10, 45, 3, RGB(0,0,0),210, RGB(0,255,0));
TEXTOUT_P("| Depr. expence | Accumul. dep. at year-end |", 5, 65);
TEXTOUT_P("| Book value at year-end | Remaining value |", 5, 80);
TEXTOUT_P("DB: Declining Balance method", 10, 100, 3, RGB(0,0,0),210, RGB(0,255,0));
TEXTOUT_P("| Dep. rate | D. expence | Accum. d. y-end |", 5, 115);
TEXTOUT_P("| Book value at year-end | Remaining value |", 5, 130);
TEXTOUT_P("SOYD: Sum of the Years Digits method", 10, 150, 3, RGB(0,0,0),250, RGB(0,255,0));
TEXTOUT_P("| Depreciation Base | D. rate | D. expence |", 5, 165);
TEXTOUT_P("| Accumulated dep. y-end | Book val y-end |", 5, 180);
TEXTOUT_P("| Remaining value |", 5, 195);
BLIT_P(G1, G0);
WAIT;
smenu();
END;
sl()
BEGIN
// Straight Line
// cfa = cost of fix assets, rv = residual value, ula = useful life of assets (years)
// ade = annual depreciation expence, dr = depreciation rate
// adye = accumulated depreciation at year-end, bvye = book value at year-end
local ade, dr, adye, bvye, j;
local slmat;
slmat:= MAKEMAT(0,1,3);
ade:= (cfa-rv)/ula;
dr:= ade/(cfa-rv);
adye:=0;
bvye:=cfa;
FOR j FROM 1 TO ula DO
slmat(j,1):= ade;
slmat(j,2):= adye + ade*j;
slmat(j,3):= bvye - ade*j;
END; // for
sto(slmat, D_SLmat);
RECT_P();
TEXTOUT_P("Depreciation w/ Straight Line method ", 25, 20, 3, RGB(255,0,0));
TEXTOUT_P("Depreciation expence " + EVAL(ade), 25, 50);
TEXTOUT_P("Depreciation rate " + EVAL(dr*100) + "%", 25, 70);
TEXTOUT_P("Table esported in matrix D_SLmat", 25, 120, 3, RGB(0,0, 255));
TEXTOUT_P("Press ESC key to continue", 25, 140, 3);
WAIT;
RETURN;
END;
dbal()
BEGIN
// Declining Balance
// drate = depreciation rate for full depreciation by the end
local ade, dr, j;
local dbmat, drate;
dbmat:= MAKEMAT(0,1,5);
dr:=(2*(cfa-rv)/ula)/(cfa-rv);
drate:= 1- (rv/cfa)^(1/ula);
ade:=cfa*dr;
dbmat(1,1):=dr*100; dbmat(1,2):= ade; dbmat(1,3):= ade;
dbmat(1,4):= cfa-ade; dbmat(1,5):= dbmat(1,4) - rv;
FOR j FROM 2 TO ula DO
dbmat(j,1):= dr*100;
dbmat(j,2):= EVAL(dbmat(j-1,2)) * (1-dr);
dbmat(j,3):= EVAL(dbmat(j-1,3)) + EVAL(dbmat(j,2));
dbmat(j,4):= EVAL(dbmat(j-1,4)) - EVAL(dbmat(j,2));
dbmat(j,5):= EVAL(dbmat(j,4)) - rv;
END; // for
dbmat(ula,1):= ROUND(((dbmat(ula-1,4) - rv)/dbmat(ula-1,4))*100,3);
dbmat(ula,2):= EVAL(dbmat(ula-1,4)) - rv;
dbmat(ula,3):= EVAL(dbmat(ula-1,3)) + EVAL(dbmat(ula,2));
dbmat(ula,4):= rv;
dbmat(ula,5):= dbmat(ula,4) - rv;
sto(dbmat, D_DBmat);
sto(drate, D_DBendRate);
RECT_P();
TEXTOUT_P("Depreciation w/ Declining Balance method ", 25, 20, 3, RGB(255,0,0));
TEXTOUT_P("Depreciation expence " + EVAL(ade), 25, 50);
TEXTOUT_P("Depreciation rate " + EVAL(dr*100) + "%", 25, 70);
TEXTOUT_P("Table esported in matrix D_DBmat", 25, 120, 3, RGB(0,0, 255));
TEXTOUT_P("Press ESC key to continue", 25, 140, 3);
WAIT;
RETURN;
END;
soyd()
BEGIN
// Sum of the Year Digits
local ade, dr, soyd;
local sdmat, dbs, j;
sdmat:= MAKEMAT(0,1,5);
soyd:= ((ula^2)+ula)/2;
dbs:= cfa-rv;
sdmat(1,1):=cfa-rv; sdmat(1,2):=ula/soyd; sdmat(1,3):= sdmat(1,1)*sdmat(1,2);
sdmat(1,4):= sdmat(1,3); sdmat(1,5):= cfa - sdmat(1,4);
sdmat(1,6):= sdmat(1,5) - rv;
FOR j FROM 2 to ula DO
sdmat(j,1):= dbs;
sdmat(j,2):= (ula+1-j)/soyd;
sdmat(j,3):= sdmat(j,1)*sdmat(j,2);
sdmat(j,4):= sdmat(j-1,4)+sdmat(j,3);
sdmat(j,5):= sdmat(j-1,5)-sdmat(j,3);
sdmat(j,6):= sdmat(j,5) - rv;
sdmat(j,2):= round(sdmat(j,2),3);
END; // for
sdmat(1,2):= round(sdmat(1,2),3);
sto(sdmat, D_SOYDmat);
RECT_P();
TEXTOUT_P("Depreciation Sum of the Year Digits method ", 25, 20, 3, RGB(255,0,0));
TEXTOUT_P("Sum of the year digits " + EVAL(soyd), 25, 50);
TEXTOUT_P("Depreciation rate " + EVAL(ula) + "/" + EVAL(soyd) + " ∷ 1/" + EVAL(soyd) , 25, 70);
TEXTOUT_P("Table esported in matrix D_SOYDmat", 25, 100, 3, RGB(0,0, 255));
TEXTOUT_P("Press ESC key to continue", 25, 120, 3);
WAIT;
RETURN;
END;
smenu()
BEGIN
local ch;
CHOOSE(ch, "Method of Depreciation", "Labels of tables", "Another calculation?", "Quit");
CASE
IF ch==1 THEN labelmat(); END;
IF ch==2 THEN Depreciation(); END;
IF ch==3 THEN RETURN; END;
DEFAULT
END; //case
END;
∫aL√0mic (IT9CLU) :: HP Prime 50g 41CX 71b 42s 39s 35s 12C 15C - DM42, DM41X - WP34s Prime Soft. Lib
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