If you did that to me I would pay you last years price , and tell you to never service my account again!
The customer is expecting that if you didn't tell him of a change in the price that it's still the same, I would feel like a theif if I misrepersented my prices and billed after the work was done more than the agreeded ( you both must know the price to agree)price its bait and switch and should get your busines lic. revoked.
C.R.L. Construction Corp. T/A
Always Green Landscaping
Landscape/ Excavation Contractors