I have a chart that was sent to me. I'd like to know how they calculated these figures. I've tried diligently to come up with the calculation for it, but with no luck. Could you please help me? It looks like this.
1-5 $12.50
6 $14.30
7 $16.10
8 $17.90
etc.
35 $51.50
36 $52.70
100 $119.50

How can I find the calculation for this. I need to design a spreadsheet and include this calculation.
Thank you so much.