What i am looking for is just a average per round. A round being one of the following 1. Early Spring 2. Late Spring 3. Summer 4. Fall I am normally a granular company but this customer is a town park and wants liquid fertilizer and weed control. But thats O.K. I am buying a small liquid company next Tuesday and he has a 500 gal. tank. He is going to set up the application Program and Schedule he has used for a few years. Witch i will find out on Friday. So what i am looking for is what you would charge and/or how you calculate your price. And if you want also what you would use per round. One more thing Thank You for all who respond. I really appreciate ALL your responses.