A B C D E F G 1 Shelby Shelving Company LP Model 2 3 Machine requirements (hours per unit) A Model S Model LX 5 Stamping 0.3 0.3 The essential point here is that fixed costs are fixed and shouldn't play any 6 Forming 0.25 0.5 role in product mix decisions. 7 8 Model S Model LX 9 Production per month 1900 ### 10