How exactly do I pay to get my item(s) sharpened?

Very easily.  Just use your ticket 'claim check' to 'pick up' your items where you dropped them off originally. (or click HERE)

Then turn and head for the cashier locations near where you entered into the store and pay there.

Most locations accept payment with the usual credit / debit cards and cash.

Your sharpening order is 'taxable' under Texas law just so you know in advance.