Also, look at:	Discount Are reductions to the basic charter price. They could modify the charter price either based on the duration of the trip (the longer trip triggering higher discounts), or on the time when the holiday will be booked (early booking) - these are intended to speed payment and thereby provide liquidity to the agency.			related sites
Sidenote The most common discounts are:   5%  Repeat client  10%  Early booking   5%  3 week charter    10%  4 week charter