SD Ltd has a standard variable overhead rate of $4.50 per direct labour hour. The standard quantity of direct labour per unit of production is 3.5 hours. The company's static budget was based on 50,000 units. Actual results for the year are as follows:

Actual units produced: 46,000 units

Actual direct labour hours: 120,000 hours

Actual variable overhead: $495,000

What is the company's flexible budget for variable overhead costs for the actual output?