Answer:
$796
Explanation:
We have been given that Marge bought a computer for $699 on the installment plan. The terms of the plan were a down payment of $100, then payments of $58 a month for 12 months.
First of all, we will find the amount paid in 12 months by multiplying $58 by 12 as:
![\text{Amount paid in 12 months}=\$58* 12](https://img.qammunity.org/2021/formulas/mathematics/high-school/zscxjsdi1a222whaurdctlk4g8k3oev1u6.png)
![\text{Amount paid in 12 months}=\$696](https://img.qammunity.org/2021/formulas/mathematics/high-school/uyoze67t7k5d91yadnubql8dw5dbxawgi2.png)
Since Marge paid $100 as down payment, so her total cost would be down payment plus amount paid in 12 months.
![\text{Marge's total cost}=\$100+\$696](https://img.qammunity.org/2021/formulas/mathematics/high-school/hkyt5tt2akdmo846vowhev4qretfyiv2ll.png)
![\text{Marge's total cost}=\$796](https://img.qammunity.org/2021/formulas/mathematics/high-school/r328tmibe8hvkk5l4mqr3o64zgons40cmi.png)
Therefore, Marge's total cost was $796.