Marvel Parts, Incorporated, manufactures auto accessories. One of the company's products is a set of seat covers that can be adjusted to fit nearly any small car. The company has a standard cost system in use for all of its products. According to the standards that have been set for the seat covers, the factory should work $1,040$ ?hours each month to produce $2,080$ ?sets of covers. The standard costs associated with this level of production are:

During August, the factory worked only $600$ ?direct labor$-$hours and produced $1,800$ ?sets of covers. The following actual costs were recorded during the month:

$\backslash$table$[[,$Total,$\backslash$table$[[$Per Set of$],[$Covers$]]],[\backslash$table$[[$Direct materials $(5,000$ ?yards$)],[$Direct labor$],[$Variable manufacturing overhead$]],\backslash$table$[[\backslash$table$[[34,200],[+6,660$