3484
All of these come from China so expect a 4-6 week delivery time.
Waterproof Indestructible Wallet – $2.45
http://www.amazon.com/gp/product/B002JWF6OC/ref=oh_details_o09_s00_i00?ie=UTF8&psc=1
Credit Card Size Survival Pocket Tool - $1.18
http://www.amazon.com/gp/product/B000Q06LI4/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1
Ring Bottle Opener – $0.65
http://www.amazon.com/gp/product/B001U2RNXE/ref=oh_details_o01_s00_i00?ie=UTF8&psc=1
Totals to $4.28 so you would have some left over.
You could also get World’s Smallest Solar Powered Car - $1.99
http://www.amazon.com/gp/product/B004FEXUP4/ref=oh_details_o09_s00_i00?ie=UTF8&psc=1