The following information is available for Tunic Pipes for the year:

Budgeted sales during the year	5,000 units
Actual sales during the year	4,500 units
Budgeted machine-hours required for the year	10,000 hours
Actual machine-hours during the year	9,000 hours
Budgeted variable overhead costs	$5,000,000
Actual variable overhead costs	$4,750,000

What is the variable overhead flexible-budget variance for the year? Assume machine-hours as the only cost-allocation base.