. Consider the data given in the problem above and assume that Hannah and Sam are currently remodeling 200 square feet each week. That is, their capital stock is fixed at the level that corresponds to the cost minimizing input combination for remodeling 200 square feet each week. And capital stock cannot be changed in short run while labor is completely variable. What is their short-runand long-run cost function?

Xinhong company is considering replacing one of its manufacturing machines. the machine has a book value of $39,000 and a remaining useful life of 5 years, at which time its salvage value will be zero. it has a current market value of $49,000. variable manufacturing costs are $33,300 per year for this machine. information on two alternative replacement machines follows. alternative a alternative b cost $ 115,000 $ 117,000 variable manufacturing costs per year 22,900 10,100 1. calculate the total change in net income if alternative a and b is adopted. 2. should xinhong keep or replace its manufacturing machine