You need to challenge yourselfright now to find the time to set programs up to encourage future sales, even during the busiest retail season of the year.
Both parties have to register their fingerprints using a biometric scanner that's plugged into the washing machine, which will only work if it scans a different finger than the one used before (you could also trick the machine and use two of your own fingers when you first set things up, but you'd only be fooling yourselfright?).