Work is processed in batches at each step. Before a batch is processed at a step, the machine at that step must be set up$.($During a setup, the machine is unable to process any product.$)$ Assume that there is a dedicated setup operator for each machine $($i$.$e$.,$ there is always someone available to perform a setup at each machine$).$

a$)$ What is the capacity of Step $1$ if the batch size is $40$ units? Please report your answer in units $/$ hour.