The following standards have been established for a raw material used to make product I$92$: Standard quantity of the material per unit of output$6\mathrm{.}25$ pounds Standard price of the material$$2\mathrm{.}30$ per pound Standard hours of labor per unit of output$3\mathrm{.}25$ hours Standard rate of the labor per hour$$8\mathrm{.}10$ per hour The following data pertain to a recent months operations: Actual material purchased$14,490$ pounds Actual cost of material purchased$$30,600$ Actual material used in production$14,490$ pounds Actual output$2,300$ units of product I$92$ Actual labor used$7,705$ hours Actual total labor cost $$61,640$ Required:a$.$ What is the materials price variance for the month?b$.$ What is the materials quantity variance for the month?c$.$ What is the labor rate variance for the month?d$.$ What is the labor efficiency variance for the month?