Standard costing- Areas of difficulty

Hi Moffat,
Thks a lot for this platform.
Kindly help solve this problem-

Budgeted sales for product X in January are 5,000 units at a standard selling price of $12 per unit. The standard variable cost of X is $8 per unit. Actual selling price in January is $13 per unit, resulting in a sales price variance of $8,000 favourable.

What is the favourable sales volume contribution variance in January?