How much would 100 pieces of chicken cost? And how much in advance do I need to order it.

This is a question you should call the store about

Depends on the size so it's hard to say. Definitely something you're going to want to call about

I would call the butcher's and tell them what you need as in mixed Chicken or White meat,then tell them when you would need it!

Call the deli department

I would least call a week in advance and prices run different with every special