I have a logic problem. I would like to set prices to climb. I will give you an example without putting any currency, but only to make people understand.
From 1 to 5 hours: 25
above 5 hours: 20
above 10 hours: 15
above 15 hours: 10
well ... if I have 5 hours then I turn 125
but if I have 6 become 120 ... that are less!
I would like to find a formula that solves this problem.
In short, I would like to manage falling prices if the hours increase, but without creating anomalies like the one described.