I need a gf that has a pad let. pls

How do i work this problem out using the equation a=pe^rt

Asif spent $745.10 on 13 new file cabinets for his office. small file cabinets cost $43.50 and large file cabinets cost $65.95. write and solve a system of equations to find the number of small cabinets and large cabinets he purchased. determine if each statement is true or false. 1. he purchased 5 small cabinets. true or false 2. he purchased 7 large cabinets. true or false 3. he spent $527.60 on large cabinets. true or false

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)