The following are the actual results for Bentler Associates for the most recent period:

Sales volume $75,680$ units

Sales revenue $ $983,840$

Variable costs

Manufacturing $246,080$

Marketing and administrative $39,250$

Contribution margin $ $698,510$

Fixed costs

Manufacturing $441,780$

Marketing and administrative $104,150$

Operating profit $ $152,580$

The company planned to produce and sell $86,000$ units for $$12\mathrm{.}50$ each. At that volume, the contribution margin would have been $$760,000.$ Variable marketing and administrative costs are budgeted at $5$ percent of sales revenue. Manufacturing fixed costs are estimated at $$5$ per unit at the budgeted volume of $86,000$ units. Management notes, $$We budget an operating profit of $$2\mathrm{.}50$ per unit at the budgeted volume.$$

Required:

a$.$ Construct the master budget for the period.

b$.$ Prepare a profit variance analysis.