The way they solve this at a huge pumpkin patch out in Snohomish, WA (not Craven) is by having a member of staff walk down the line and tally up before people h

The way they solve this at a huge pumpkin patch out in Snohomish, WA (not Craven) is by having a member of staff walk down the line and tally up before people hit the register. They write the sizes and sum on a piece of paper, you give it to a cashier. Done. Lines went QUICK. Low tech, works well.