disclosed is a method for increasing the conversion rate , or the ratio of the number of actual buyers to the number of site visitors , of an computer - implemented system such as an internet e - commerce website . shopping cart abandonment may be reduced though the disclosed method wherein filler items are suggested to the consumer in order to qualify the consumer for a promotional bonus , such as free shipping . by simplifying the consumer &# 39 ; s task of selecting filler items , the consumer may be more likely to consummate the sale instead of abandoning the shopping cart to find a better deal elsewhere . in the event no suitable filler items can be identified , alternative promotions may be presented to the consumer , for example , reduced rate shipping .