Sheffield Company accumulates the following data concerning raw materials in making one gallon of finished product. (1) Price-net purchase price $2.10, freight-in $0.20, and receiving and handling $0.10. (2) Quantity-required materials 4.20 pounds, allowance for waste and spoilage 0.40 pounds. Compute the following. (Round answers to 2 decimal places, eg. 1.25.) (a) Standard direct materials price per gallon $ (b) Standard direct materials quantity per gallon. pounds (c) Total standard materials cost per gallon $