Break-Even with Mixed Costs

I can't figure out how you find the break-even quantity with a mixed cost. Here is the problem:

LOST sponsors a 5-day camping trip. LOST provides a $3,000 grant and collects $350 per camper. The program expects 150 campers and the following expenses: Campground fees, $6,500 for 3 days, Transportation fees $3925 with 60 person capacity, Outdoor equipment rental $45 per camper, meals $55 per camper per day. Determine the break-even number of campers.

Can you help?