There are three sizes of pizza bases; namely regular, large, and family, which FBL Pizzas & Café has on its menu for their customers to choose from. Based on order estimates, the café manager has decided to combine orders for the same pizza base size to increase the work order size and therefore be able to make one large baking run per pizza base size. Special ovens are used to bake these pizza bases, and it is time-consuming to clean these ovens and set them up again between baking runs. Each special oven and pizza-chef work a daily ninehour shift with a fifty-minute lunch break and two smaller rest breaks of twenty minutes each.

Pizza base size Setup time (minutes) Processing time (seconds) Order quantity (no. of pizza bases)
Regular 5 600 10
Large 7.5 900 20
Family 9 1200 30

What is the total workload (demand) in hours for the above work order mix?