Exercise 11-53 (Static) Physical Quantities Method with By-Product (LO 11-8, 10) Trans-Pacific Lumber runs a mill in the Northwest that produces two grades of lumber, A and B, and a by-product, sawdust. The company chooses to allocate the costs on the basis of the physical quantities method. ast month, it processed 125,000 logs at a total cost of $350,000. The output of the process consisted of 34,000 units of grade A, 51,000 units of grade B, and 15,000 units of sawdust. The sawdust can be sold for $20,000. This is considered to be its net realizable alue, which is deducted from the processing costs of the main products. Required: What share of the joint costs should be assigned to grade A and grade B ? (Do not round intermediate calculations.)