how much to charge for these stickers

[prettybird 0]

Hi, I have a customer that wants some printed stickers about 4"x2.5" They will be printed with our Roland SC500 and will be black with white letters and only two words for the name of their farm. They might want around 100 stickers at a time. Anyone have any suggestions on what to charge for these? I haven't really sold anything that we printed before so I'm not sure how much to charge to pay for the ink and the time, etc. Any help would really be appreciated. Thanks!