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5.20. The aggregate plan specifies 1,300 hours of labor for the next week. (a) Using the data below, find the disaggregated produc- tion plan. Each item requires 1 hour of labor per unit pro- duced. In which order would you suggest producing the items? Why? Initial Average Weekly Demand Safety Stock Inventory Model 1 110 500 50 4 600 50 73 300 25 (b) Repeat part (a) assuming models 1 and 2 require 1 hour of production per unit, but item 3 requires 1.3 hours of labor per unit. 23