Kaplan Revision Kit: Accounting for Labour

Hi Sir,
This question came up in the Kaplan Revision Kit and I can’t figure out to solve it.

Question: Budgeted production in a factory for next period is 4800 units. Each unit requires five labour hours to make, Labour is paid $10 per hour. Idle time represents 20% of the total labour time. What is the budgeted total labour cost for the next period?