I think I'm slow

My main concern is over charging clients but this took me 9.5 hrs to, cut, mount, prime, and paint 2 coats. Brackets are held with anchors and PL glue and the ends of the handrail are glued to the wall with PL. Seems really strong but Im worried, I take too long. I Definitely dont do a lot of handrails

How many hrs would you estimate? No helper.