Yup. I always kept every single receipt for anything I ever purchased for work. When I was welding it was tips, cones, gloves, etc. That in itself would add up a good bit.
Then when I joined the Corps, I started getting an annual clothing allowance, which helped a lot, but anyone that has ever served knows that is no where near what you spend on stuff for inspections and what not. Hell I even kept the receipts for haircuts. It is amazing how four dollars here, and a dollar there adds up over a year. Heck that is over four hundred a year in just haircuts.