Answer showing process please.

A. Carolina got a quarter game at $ 1,689 to pay for monthly for three years. She will pay an interest of 1.9% per month. How much will your monthly payments be?

B. Karla is dedicated to coordinating activities. It has a wedding offer of a fixed cost of $ 225 plus a variable cost of $ 18 per person.

Show a linear model, determining the total cost. What is the total cost for a wedding couple who have 174 guests at their wedding?

C. A door manufacturer decides to sell each door for $ 499. It has a manufacturing cost per door of $ 285 and fixed costs are $ 4,708 per week. How many doors should you produce and sell each week in order to ensure that the business remains break-even?