Chris needs to buy a new stove in 5 years. He starts to deposit money quarterly, with the first saving in 3 month. If his investment earns 5% APR compounded semi-annually, how much he should invest every three month to buy a $2000 stove in 5 years? (Round your answer to two decimals.)
Semi annual rate = 5%/ 2 = 2.5%
(1 + semi annual rate)^n - 1 = (1 + quarterly rate)^4 - 1
(1 + 0.025)^2 - 1 = (1 + quarterly rate)^4 - 1
0.0506 = (1 + quarterly rate)^4 - 1
1.012417 = 1 + quarterly rate
Quarterly rate = 0.012417 or 1.2417%
Number of periods = 5 * 4 = 20
Future value = Payments * [(1 + r)^n - 1] / r
2000 = Payments * [(1 + 0.012417)^20 - 1] / 0.012417
2000 = Payments * [1.279937 - 1] / 0.012417
2000 = Payments * 22.544653
Payments = $88.71
He should invest $88.71
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