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ornerstone Exercise 9.1 Calculating Standard Quantities for Actual Production uillermo's Oil and Lube Company is a service company that offers oil changes and lubr takes 24 minutes and 6.2 quarts of oil are used. In June, Guillermo's Oil and Lube had 980 ofl 9.1 change for automobiles and light trucks. On average, Guillermo has found that a typical oil changes