No space for postal/zip code. May want to take out the discount column or allow it to be removed; If I'm not giving a discount, I may not want the customer to s

No space for postal/zip code. May want to take out the discount column or allow it to be removed; If I'm not giving a discount, I may not want the customer to see that. I like that you can either add a new row below an existing row or at the bottom.