Abstract: A computer system comprising of a database that includes a plurality of sales campaign data records and a plurality of user records; and an application server programmed to: select a sales campaign from the plurality of sales campaigns and initiate the sales campaign, including: determine a campaign time period, a service time, and a vendor location associated with the sales campaign; identify consumers associated with the sales campaign including: identify user records having free time slots that are within the current campaign time period; determine a current location of a mobile computing device associated with the identified user record; determine a first travel time; determine a second travel time; determine a total event time period; generate a set of qualified consumers having a determined total event time period within a corresponding free time slot; and transmit a notification including a promotion to each mobile computing device.