How much do I charge for these planters?

[McGaw]

Hey guys,

So I was asked to find some planter boxes that look nice and will last a little while for a customers property. I asked what she thought about me building her some? She said she would love to see them. She popped by last night (she lives just down the street and heard me cutting wood) and her daughter was with her. Her daughter wants me to make some for her now.
How much do I charge for them? I was just going to give the older lady one for free since shes been a long time customer.
Heres a picture of how they look right now. I'll post a picture of the finished product (shouldn't be too much longer)


Thank you very much. First time I've ever done anything like this before


P.s.
I still have to put the last side on, and then put the borders around them, using 1x2 or 1x3 and make a border out of each side.

[Az Gardener]

90 bucks each and I think that's cheap

[NarNar]

I normally charge $30-$40 per our, calculate how long it took (say 2 hours) that will be $60-$80 then add in cost of Material+ 15% mark up= total cost

I try to stay with this formula, but each job is different. Quote accordingly.