Assume the following:

$$ The variable portion of the predetermined overhead rate is $$1\mathrm{.}50$ per direct labor$-$hour.

$$ The standard labor$-$hours allowed per unit of finished goods is $3$ hours.

$$ The actual quantity of labor hours worked during the period was $43,150$ hours.

$$ The total actual variable manufacturing overhead cost for the period was $$63,000.$

$$ The company produced $15,000$ units of finished goods during the period.

What is the variable overhead rate variance?