Those are not costs associated with your job, that’s why you can’t deduct them.
A business gets to deduct “all” its costs because all the costs are associated with the business. There are laws around this, and no, not everything can be deducted.
In the made up numbers you presented
Yes, that’s how examples work. Do you think the numbers are “wrong”? The prices and margin that I gave for a PC build are very reasonable and realistic.
Answer my questions from my example. Last chance then you’re blocked as you’re clearly not capable of intelligent debate.
That url isn’t base64 encoded. You can tell by the fact that it’s still a URL, and doesn’t decode……