Jake and zach are identical twins who attended grammar school through college together. jake took a job as an engineer who does not have to travel out of the state. zach took a job as an engineer who must travel out of state once a week. jake earns $125,000 a year, and zach earns $155,000 a year. select the best explanation for this wage difference.
a. zach puts in less effort than jake.
b. jake’s lower salary supports the signaling theory of education.
c. zach has less human capital than jake.
d. zach receives a higher wage to compensate for the disagreeable nature of business travel.

Waterway company’s record of transactions for the month of april was as follows. purchases sales april 1 (balance on hand) 672 @ $6.00 april 3 560 @ $11.00 4 1,680 @ 6.08 9 1,568 @ 11.00 8 896 @ 6.41 11 672 @ 12.00 13 1,344 @ 6.51 23 1,344 @ 12.00 21 784 @ 6.61 27 1,008 @ 13.00 29 560 @ 6.79 5,152 5,936 (a) calculate average-cost per unit. (b) assuming that periodic inventory records are kept in units only, compute the inventory at april 30 using lifo and average-cost. (c) assuming that perpetual inventory records are kept in dollars, determine the inventory using (1) fifo and (2) lifo. (d) compute cost of goods sold assuming periodic inventory procedures and inventory priced at fifo.