How many vouchers for party of 2?

[Disney4me04]

It is me and DS going alone. I would like to get some vouchers for food.

I am just not sure how many I should get?

I know we are doing the following:
Hoop De Doo
Sci Fi
Chef Mickey
Fulton's Crab

That is all we have planned for meals. The rest will be counter service.

Thanks