Margin and markup are not the same number, and mixing them up is the most expensive small mistake in pricing. Put your cost and your price in — you get profit, both percentages, what a discount does to them, and the price you'd need for a target margin.
Materials, subcontractors, your own hours at your rate — everything you spend to deliver it.
Used only for the "price I should charge" line. 30% is a common service target — set yours.
A $600 cost sold for $1,500 is 60% margin but 150% markup. Quoting "150% margin" to a client who checks would be embarrassing — this tool tells you which one you're holding.
You have the number. Check it against your fixed costs, then use the free invoice generator to put it in front of a client.