Krumple Inc. produces aluminum cans. Production of 12-ounce cans has a standard unit quantity of 4.5 ounces of aluminum per can. During the month of April, 296,000 cans were produced using 1,250,000 ounces of aluminum. The actual cost of aluminum was $0.15 per ounce and the standard price was $0.04 per ounce. There are no beginning or ending inventories of aluminum. Calculate the materials price and usage variances using the columnar and formula approaches.