One easy way is to see what the item is valued in its (currently) USED condition. Then SUBTRACT that amount from what it cost when NEW. The difference can be considered the "business portion"....Go on Craigs list or Ebay or any other Used Marketplace to see what its going for Used!!........If you are one one those YouTube channels that DESTROYS the item, then you can use all of it as the 'Business Portion"
HERE IS HOW YOU DO IT:
New cost $500 (minus) Used Value $300=$200 is the Business Portion
