I'm advertising to areate lawns for 60.00 up to 5,000 square ft plus 10.00 for every additional 1000 sf. Seeding is double the price. I got a call from a guy who said he wants his yard done, but he said it's a little more than 5,000 sf. and I probably have to pay more. I measured it and it came out to be an acre 43,749 sf. How much should I charge to areate and seed this job?