how would I solve

Shapely Donuts, in making its famous doughnuts, begins with the three-step process shown below. Station A mixes the dough and shapes the doughnut. Station B cooks the doughnut. Station C flavors the doughnut. Each of the three stations is staffed by one dedicated worker. Assume that all setups are done by the workers. A setup must be performed in each step of the process before every batch. Also, assume that each worker is busy during the run time of his or her operation. Suppose the batch size is 40 doughnuts. How many doughnuts can they produce in one eight-hour shift? Type your answer into the box as a number only. Do not enter any non-numerical characters. For example, an answer of 122 doughnuts viould be entered as "122". Note: A shift can only produce a whole number of batches - no partial batches are allowed