Abstract: A computer implemented invention provides a system and method for receiving at a server computer system first signals containing a conditional acceptance of an offer in association with an identification of a first entity conditionally accepting said offer, said offer containing a price; checking signals received by said server computer system during a period from said date of conditional acceptance of said offer to determine if said signals contain an identification of said offer in association with an identification of a second entity and a contribution by said second entity to said price; and debiting accounts for the entity or the entities contributing to said price, thereby enabling a group on entities to contribute to satisfying the conditions of an offer.