contributions non deductible

[Sandy]

Our church is buying t-shirts for members to wear at certain functions (mostly outreach) to get a bulk purchase price. Members are paying for their own shirts. They are writing checks to the church and the church is paying by credit card. What is the best way to enter these checks so they are not deductible and not showing on contribution reports. This will be an ongoing thing meaning we will purchase shirts again at a later date.

Thanks in advance