I'm mainly struggling with the tense of the verb that comes after the word "you" (I'm not really sure what the grammatical answer is).
For example, I'm not really sure if it's:
"I was wondering if you had this item on sale" or "I was wondering if you have this item on sale"
Or
"I was wondering if you were on a break" or "I was wondering if you a re on a break"
Best Answer
This asks if the person had been taking a break in the past
This asks if the person is currently taking a break (which means they're on break in the present)
In your first scenarios about the grocery store I can see both being used in common day-day language expressing that they want to know if an item is on sale, but the proper form would be to use the second form, since asking if "you have this item on sale" implies that you are asking about the present