i don't know how to do this. Please help?

Overhead is applied on the baxis of standard machine hours. Three hours of machine time are required for each direct labor hour. The jobs were sold for $458,000. Selling and administrative expenses were $42,000. Assume that the amount of raw materials purchased equaled the amount used. (a) Compute all of the variances for (1) direct materials and (2) direct labor. (Round per unit values to 2 decimal places, eg. 52.75 and final answers to odecimal ploces, es.52. (b) Compute the total overhead variance. Overhead is applied on the baxis of standard machine hours. Three hours of machine time are required for each direct labor hour. The jobs were sold for $458,000. Selling and administrative expenses were $42,000. Assume that the amount of raw materials purchased equaled the amount used. (a) Compute all of the variances for (1) direct materials and (2) direct labor. (Round per unit values to 2 decimal places, eg. 52.75 and final answers to odecimal ploces, es.52. (b) Compute the total overhead variance