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Direct Materials, Direct Labor, and Factory Overhead Cost Varlance Analysis Santiago Inc. processes a base chemical into plastic. Standard costs and actual costs for direct materlals, direct labor, and factory overhead incurred for the manufactur of 74,000 units of product were as follows: Required: a. Determine the direct materials price variance, direct materials quantity vartance, and total direct materials cost variance. Enter a favorable variance as a negative number using a minus sign and an unfavorable variance as a positive number. b. Determine the direct labor rate variance, direct labor time variance, and total direct laber cost variance. Enter a favorabie variance as a negative number using a minus sign and an unfavorable variance as a positive number. c. Determine the variable factory overhead controliable varlance, fixed foctory overhead volume variance, and tocal factory overhead cost variance. Enter a favorable variance as a negative number using a minus sign and an unfovorable variance as a positive number