$(1)8-29$ Variable manufacturing overhead variance analysis. The Sourdough Bread Company bakes baguettes for distribution to upscale grocery stores. The company has two direct$-$cost categories: diract materials and direct manufacturing labour. Variable manufacturing overhead is allocated to products on the basis of standard direct manufacturing labour$-$hours. Following is some budget data for the Sourdough Bread Company:

Direct manufacturing labour use

Variable manufacturing overhead

$0\mathrm{.}02$ hours per baguette

$$10\mathrm{.}00$ per direct manufacturing labour$-$hour

The Sourdough Bread Company provides the following additional data for the year ended December $31$ :

Planned $($budgeted$)$ output

Actual production

Direct manufacturing labour

Actual variable manufacturing overhead

$3,100,000$ baguettes

$2,600,000$ baguettes

$46,800$ hours

$$617,760$