80;
FC(y) = (10)(20) = 200.
SMC(y) = 1 if y 80.
AVC(y) = 1 if y 80.
STC(y) = VC(y) + F C(y) = y + 200 if y 80.
AFC(y) = 200/y.
SAC(y) = 1 + 200/y if y 80.
VC(y) = 2(y/2) = y if yGiven the production function it is impossible to produce more than 80 units, so all the costs except FC are infinite in this case.FC(y) = (10)(20) = 200.
SMC(y) = 1 if y
AVC(y) = 1 if y
STC(y) = VC(y) + F C(y) = y + 200 if y
AFC(y) = 200/y.
SAC(y) = 1 + 200/y if y