Abbott Manufacturing produces plastic cases for solar photovoltaic panels and has decided to combine orders from customers to increase work order size, and thereby make one large production run per model type. Plastic injection molding machines are used to make these parts, and it is time consuming to clean the machines and set them up again between production runs. Each molding machine and operator works one 9-hour shift with a one-hour lunch break and one-half hour for operator breaks. Used from book What is the total workload (demand) in hours for this work order mix