part 1 and 2 is correct but part 3 is wrong , i think the Triol is wrong with total

Allocating Joint Costs Using the Constant Gross Margin Method A company manufactures three products, L-Ten, Triol, and Pioze, from a joint process. Each production run costs $12,800. None of the products can be sold at split-off, but must be processed further. Information on one batch of the three products is as follows: Further Processing Cost per Gallon Product Gallons Eventual Market Price per Gallon L-Ten 3,400 $0.50 $2.00 Triol 4,000 1.00 5.00 ploze 2,400 1.50 6.00 Required: