Max $200DRB+280DRW$

s$.$t$.$

$20DRB+25DRW40,000$ Steel available

$40DRB+100DRW120,000$ Manufacturing minutes

$60DRB+40DRW96,000$ Assembly minutes

$,DRB,DRW0$

The computer solution is shown in Figure $3\mathrm{.}20.$

a$.$ What are the optimal solution and the total profit contribution?

b$.$ Another supplier offered to provide Deegan Industries with an additional $500$ pounds of the steel alloy at $$2$ per fiund. Should Deegan purchase the additional pounds of the steel alloy? Explain.