In a single writing, a painter contracted with a farmer to paint three identical barns on her rural estate for $2,000 each. the contract provided for the farmer's payment of $6,000 upon the painter's completion of the work on all three barns. the painter did not ask for any payment when the first barn was completely painted, but she demanded $4,000 after painting the second barn. is the farmer obligated to make the $4,000 payment?

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