Select one: O a. Salary of the guard of the factory premises b. Advertising costs O c. Cost of memory chips O d. Salary of people working on assembly lines A company produces washers and dryers in an assembly-line process. Labor costs incurred during a recent period were: corporate executives, $500,000; assembly-line workers, $209,000; security guards, $45,000, and plant supervisor, $110,000. The total of company's direct labor cost was: Select one: O a. $203,000 O b. $864,000 O c $209,000 O d. $319,000 O e. $754,000 hits total prime cost