Conditioning formula to convert "x" into another cells value

good morning,

I have a spreadsheet I am trying to create for a chili cookoff, I am trying to find a way to type an "x"(or any text) in a box showing they signed up for a certain portion of the contest, and the formula automatically taking the value from another cell and inserting it instead of the x.

for example
A1- Chili B1- ribs
A2- $15 B2- $10
A3- x B3-

I would like A3 to automatically convert into A2 if anything is typed into the field and B3 to mimic B2 only if text is typed into the field.

Thank you so much for assisting me in this conundrum!