The Clark Company makes a single product and uses standard costing. Some data concerning this product for the month of May follow:

Labour rate variance	$7,000 favourable
Labour efficiency variance	$12,000 favourable
Variable overhead efficiency variance	$4,000 favourable
Number of units produced	10,000
Standard labour rate per direct labour hour	$12
Standard variable overhead rate per direct labour hour	$4
Actual labour hours used	14,000
Actual variable manufacturing overhead costs	$58,290

What was the total standard cost for variable overhead for May?

Multiple Choice

$40,000

$50,000

$56,000

$60,000