Ok so I seriously need money right now, and all I have is this stack of poster paper to draw on (which technically isn't a bad thing)

I want to do some commissions but I have no idea how much extra it would cost to safely ship 11 x 14 posters.

Since  spitandpolish is no help at all, does anyone have any advice?

I'm not even sure if people would like to commission me T_T