Answer:
$110 interest paid
Step-by-step explanation:
Let's see how much ultimately Susie has to pay.
90 per month for 2 years (2*12 = 24 months) = 90 * 24 = $2160
Also, she made a 50 dollar downpayment, so total paid is:
2160 + 50 = 2210 dollars
Thus, the cost is 2100, but ultimately she has to pay 2210 for using installment plan.
<u>How much interest is that?</u>
The exxtra amount is the interest, so
2210 - 2100 = $110 interest paid