Mettle Company produces chairs and has determined the following direct cost categories and budgeted amounts: Standard Inputs Standard Cost Categoryfor 1 outputper input Direct Materials1.00$7.50 Direct Labour0.30 9.00 Direct Marketingo.503.00 Actual performance for the company is shown below: I Actual output: (in units)4.000 Direct Materials: Materials costs $30,225 Input purchased and used 3,900 Actual price per input $7.75 Direct Manufacturing Labour: Labour costs $11,470 Labour-hours of input 1,240 Actual price per hour $9.25 Direct Marketing Labour: Labour costs$5,880 Labour-hours of input2,100 Actual price per hour$2.80 Required: a. What is the combined total of the flexible-budget variances? b.What is the rate variance of the direct materials? c. What is the rate variance of the direct manufacturing labour and the direct marketing labour, respectively