Answer:
Her installments are at a value of $162 each
Explanation:
First, we calculate the value of the balance
This is equal to the cost of the piano minus the cost of the down payment and that will be 4,000 - 400 = $3,600
Now this balance of $3,600 was financed at an interest rate of 8%
The interest here is thus 8/100 * 3,600 =$288
Thus the total amount she will be paying to cover the cost of the piano would be 3,600 + 288 = $3,888
It is this value she spread over 24 installments
The value of each installment is thus 3,888/24 = $162