I don't think it'll be a huge deal if you use 1 oz of solder or something, and dont' count it.
Think about it, maybe $2 or something, and considering it, I'd just write off whatever's leftover after all the big $ items as "supplies"
You spend $2900 on a bot, that including any paid labor, or etc. $600 in supplies? take an estimated guess.
I'm thinking in the $100 ballpark, it depends on what you use, you will be fine with just a guess, though
