So you are either too high, or too low! Great how we cleared things up for you...
Is this your first wall? Add some hours if it is.
What about disposal? The boulders, and block scrap.
Are you working with a manufacturer and/or distributor who is knowledgeable and willing to answer questions? Things like geo-textile, soil-structure, and maximum heights for the block you are using, will have a big impact on your wall's long-term success. You need a supplier/manufacturer who is going to provide that information for the block you are using to succeed at wall building.
The front door's sidewalk must be hidden in the pix.
Your p/l/c -- profit, loss and contingency-- is a bit lower than ours.
I'd rather be too high on price, and not get a job I've never done before, than too low and doing a ton of work I can't handle.
17 years old, right? I'd say you're doing damn good.