Nettle Co. uses process costing to account for the production of rubber balls. Direct materials are added at the beginning of the process and conversion costs are incurred uniformly throughout the process. Equivalent units have been calculated to be 12,000 units for materials and 10,000 units for conversion costs. Beginning inventory consisted of $7,000 in materials and $4,000 in conversion costs. April costs were $36,000 for materials and $40,000 for conversion costs. Ending inventory still in process was 4,000 units (100% complete for materials, 50% for conversion). The equivalent cost per unit for materials using the FIFO method would be closest to:

The gilbert instrument corporation is considering replacing the wood steamer it currently uses to shape guitar sides. the steamer has 6 years of remaining life. if kept,the steamer will have depreciaiton expenses of $650 for five years and $325 for the sixthyear. its current book value is $3,575, and it can be sold on an internet auction site for$4,150 at this time. if the old steamer is not replaced, it can be sold for $800 at the endof its useful life. gilbert is considering purchasing the side steamer 3000, a higher-end steamer, whichcosts $12,000 and has an estimated useful life of 6 years with an estimated salvage value of$1,500. this steamer falls into the macrs 5-year class, so the applicable depreciationrates are 20.00%, 32.00%, 19.20%, 11.52%, 11.52%, and 5.76%. the new steamer is fasterand allows for an output expansion, so sales would rise by $2,000 per year; the newmachine's much greater efficiency would reduce operating expenses by $1,900 per year.to support the greater sales, the new machine would require that inventories increase by$2,900, but accounts payable would simultaneously increase by $700. gilbert's marginalfederal-plus-state tax rate is 40%, and its wacc is 15%.a. should it replace the old steamer? b. npv of replace = $2,083.51