Convinced?
The price of our service is 15 € + VAT per hour. If you want to calculate the cost of whole service, you need to know how much time your garden needs to be attended.
Example: ordinary house with a garden and a swimming pool needs at least 3h × 2 gardener a week. 3×2×15€꓿ 90€ +VAT a week. This example is simple, but you could understand how the price was formed.