I am requested to bid on a soccer field contract. The entire field is approx. 3-3 1/2 acres. Within this field is the actual soccer field which will be mowed at a different heighth than the surrounding field. There are 4 goal posts, 1 shed and 1 sand pit to mow around. Entire field is new but has been leveled, and has one years growth of grass on it. They are not looking to have me fertilize or weed the field, just mow it. It will be mowed a minimum of 1 time each week, sometimes twice a week, depending on their practice schedule. What is the best way to calculate how much I should charge for each mowing? I have an idea in my head, but I want your guys opinion on this. If I get this contract, it would be my first commercial contract. All opinions are appreciated.