Make sure you set the prices to move the overstock items.

Will your shorts sell at $1 each? Jerseys?

If not, perhaps a "Free Box".

I get annoyed at thrift stores that would rather throw stuff away than to drop prices to where people will buy them... or down to FREE.

The other thing about clothing... presentation and organization is helpful. Tag them with sizes. Make sure prices are known. Sort? CLEAN?

Personally I dislike Jerseys with bright advertising.