Open question: Ask over participant marketing sales?

Say that you promoted a buyer O.K and it for period 1 January 09-1. April 09, you had 700 clicking for it, produced value £10,000 von Verkäufen and acquired £600.00 says, but in 1 January 10-1. April 10, you over double one clicking to the retailer, 1500 clicking had, but you worht only £2,000 sold and £100 acquired. That is a realistic drop or will you wants to investigate, if sales were produced correctly by the retailer.