OPTION COLLAPSE TRUE
OPTION DELIM ","

csv$ = LOAD$("data.csv")

DOTIMES AMOUNT(csv$, NL$)
    line$ = TOKEN$(csv$, _, NL$)

    IF _ = 1 THEN
        total$ = APPEND$(line$, 0, "SUM")
    ELSE
        line$ = CHANGE$(line$, _, STR$(_*10) )
        total$ = APPEND$(total$, 0, line$, NL$)
        total$ = APPEND$(total$, 0, STR$(LOOP(i, AMOUNT(line$), VAL(TOKEN$(line$, i)))) )
    FI
DONE

SAVE total$ TO "data.csv"
PRINT total$