all our fert programs are pre pay. this guy is very interested, i quote him $300 for the program. he says how much is that per application? i say it's not "per application", it's the fee for the program. i hand him a bill for the whole program, due now, he wants me to "justify", or explain why i want to be paid for the program now, when the applications will go down over the course of the season. what would you say?