Question $29$

A service operation consists of four stations. Station $1$ can process $150$ customers per hour. Station $2$ can process $300$ customers per hour. Stations $3$ can process $100$ customers per hour, and Station $4$ can process $150$ customers per hour. What is the maximum number of customers the entire operation can process in an hour?

a$.300$

b$.700$

c$.175$

d$.100$

e$.150$