Plugins to create price list

Hello everyone,

Does anybody knows a plugin that would allow me to create my own price list?
I am a print broker, so I’d like something where I could enter the “cost” price from my supplier (the amount it costs me to print 1000 business cards for example), and then the price I want to sell it.

Anything like that around? I’ve been searching for weeks without finding anything.

Thanks in advance!