A.2 month - 400, 6 month - 25, 8 month - 700,
rest - 373.5
B.400×(1+0.12×1210)+25×(1+0.12×126)+700×(1+0.12×124)+x=1400×(1+0.12×1212)
440+26.5+728+x=1568
x=373.5
C.Balance due in two months:
1400×(1+0.12×122)−400=1028
Interest due in four months:
1028×0.12124=41.12
41.12>25
Balance due in six months:
1028×(1+0.12×126)−(25+700)=1089.68−725=364.68
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