how would I solve?

Consider a 5-step process for the National Corporation that includes cutting, drilling. stamping, welding, and painting. The cutting department has 1 machines that each process materials at a rate of 2 minutes per unit. Drilling has 4 machines that each process materials at a rate of 9 minutes per unit. Stamping has 2 machines that each process materials at a rate of 10 minutes per unit. Welding has 4 machines that each process materials at a rate of 12 minutes per unit. Painting has 3 machines that each process materials at a rate of 1 minutes per unit. What is the capacity of the entire five-step process in units per hour? Please enter your answer rounding down to the nearest completed unit