The order matters. Grossing up for tax is a division, not an addition: if you want to keep $60,000 and set aside 25% for tax, you need $80,000 of profit, not $75,000. Adding the percentage instead of dividing by it is the most common arithmetic error in freelance pricing advice, and it leaves people about 6% short every year.
Business costs are added after that, because they come out before tax rather than after it.
Then the division. Not by 2,080 hours, which is the salaried convention and assumes you never take a day off and never spend an hour on anything unpaid. By the hours you can actually bill: working weeks, times days, times hours, times the share of that time that is billable at all.
This is a pricing floor, not a price. It is what you have to average to hit your target. Charging it is the minimum; the reason to track your time is to find out whether you actually are.