Estimated variable manufacturing overhead costs are $$425,000$ and actual variable manufacturing overhead costs are $$450,000.$ The standard allocation base is $70,000$ labor hours and the actual allocation base in labor hours is $68,000$ hours. What is the standard predetermined variable manufacturing overhead rate?

Multiple Choice Options

A$.$ $$6\mathrm{.}07$

B$.$ $$6\mathrm{.}43$

C$.$ $$6\mathrm{.}25$

D$.$ $$6\mathrm{.}62$