So I do lighting rental where we deliver, set up, program, take away. Most of the product we use is fairly expensive (moving lights, etc.) and we charge the client per item (cost of the lights, cost of cable, cost of programming, cost for trucking, etc.) so it's all itemized. I don't do a "package." Got a call to light a wedding using just pin spots. I can buy them (don't own any at the moment) for about $20 each and clamps would be another $5 each. All the other necessary gear I already have. Would you charge them typical percentage of cost for the rental (which would only be about $2 each), or a flat fee for the whole bunch (about 48), or charge about $5 per unit, or what?