I have a $15 food/beverage credit on my ticket for Saturday’s game. I have a few questions.

I have a few questions 1) Can I use the $15 for multiple purchases? Ex. Spend $7 on hotdogs in 1 purchase. Then spend the remaining $8 on another purchase. 2) Can the credit be used in all of the food/beverage (including alcohol) vendors in MMP? 3) Do the vendors have a barcode scanner for my digital ticket?