The production manager at Nike estimates that the total annual cost of producing tennis shoes is given by C = 5000 +4100Q – 8Q2 + 0.004Q3. Assume the market price of shoes is constant. What is the shutdown price in the short run?
FC=the cost is same at all level, and it is equal to the total cost at Q=0
FC=5000
VC=TC-FC
VC= 5000 +4100Q – 8Q^2 + 0.004Q^3 -5000
VC=4100Q – 8Q^2 + 0.004Q^3
AVC=VC/Q
AVC=(4100Q – 8Q^2 + 0.004Q^3)/Q
AVC=4100 – 8Q+ 0.004Q^2
the shutdown price is the price below the minimum average variable cost
min(AVC) is found by differentiation the funtion and equating to zero
dAVC/dQ=-8+0.008Q=0
Q=8/0.008
Q=1000
minAVC)=4100-8*1000+0.004*(1000^2)
=$100
the shutdown price is $100 or any price below $100.
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