I put all reciecpts in one large envelope for the month. Ill leave all that supply house invoices in there own smaller envelope and the same for the rest easy to spot the bill your looking for. I use Quik books pro and all parts bought are entered in to inventory individually and you can create a new customer and note that that part is for that job. when making out invoices theres a tabe to click and all the parts you bought for that job show up and you just click on theme if you want them put on that bill.
Any inventory item you can get a report of any bill or puchase that that part is used in you decide tha date range, Its great for the electrical trade. been useing it since 1997 and can tract all parts bought and sold and to who.
