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Acer Manipulation Manufacturing's (AMM) standards anticipate that there will be 6 pounds of raw material used for every unit of finished goods produced. AMM began the month of May with 7,500 pounds of raw material, purchased 35,000 pounds for $66,500 and ended the month with 6,800 pounds on hand. The company produced 5,700 units of finished goods. The company estimates standard costs at $2.20 per pound. The materials price and efficiency variances for the month of May were as follows