At the local garden center, flower arrangements can be custom made. The store charges a flat fee of $65 per arrangement. There is an additional cost to the store for materials used and the arrange is paid $14 per hour. The store determines its profit by the following formula: P-a(65-m-141 Pis the profit, a is the number of arrangements made, m is the cost of materials, and t is the hours spent making one arrangement. What equation shows the amount of profit earned if the arranger makes 3 arrangements and the materials for each cost $10?