Disable add-to-cart possibility (customized products) Enable information quantity option Information quantity label:
# Steps Delivery info Select Product #1 500 Select variation 500 1000 2000 3000 #2 1000 Select variation 500 1000 2000 3000 #3 2000 Select variation 500 1000 2000 3000 #4 3000 Select variation 500 1000 2000 3000 Save