Preliminary calculations: Total joint cost: 400 drums * $90/drum = $36,000
Amount of XX produced: 400 drums * 30 gallons/drum = 12,000 gallons
Amount of YY produced: 400 drums * 15 gallons/drum = 6,000 gallons
Part 1: Allocation of $36,000 based on number of gallons:
Part 2: Allocation of $36,000 based on sales value:
Part 3: Relative market values would probably be chosen.In this case,YY has a value three times that of XX,so the amount per barrel allocated to YY ($21,600/6,000 = $3.60 per barrel)is three times the amount allocated to XX ($14,400/12,000 = $1.20 per barrel).Using the relative number of gallons,both products are allocated $2 per barrel,regardless of their sales value.