When using your FVRx Bucks to purchase fresh produce, it is unlikely that your total will be an even number that can be bought using only $5 bills. If, for example, your total comes to $13.02, you have three options:
Pay the remainder with your own money (use $10 in FVRx Bucks and $3.02 of your own money).
Use only FVRx Bucks and pay slightly more than the total (use $15 in FVRx Bucks, but receive no change).
Select a bit more produce to make up the difference (for example, add a couple of apples to your purchase and bring the total to $14.55).