I take pride in what I do! But I also understand that when it really comes down to it, I am only 12 years old. I have put a lot of thought into my pricing formula which I feel means you are getting a fair price for exactly what you are asking for: a twelve year old to cut your lawn!
The formula is actually really simple. I will come out to your house to estimate your lawn's square footage. Once I have that information, the estimate is quick and easy. First, I'll multiply your square footage by my price-per-square foot rate of $.002, then I will add $1 per irregular lawn feature (tree, protruding flower bed, etc). I will get back to you within 24-hours with a guaranteed price for each time I mow your lawn. This price is guaranteed not to change for the entire lawn-mowing season.
Pricing Samples:
Basic rectangular front yard with two parking strip trees and one other irregular feature:
[(1828 square feet x $.002) plus 3 trees] rounded to nearest quarter dollar = $6.75