How many sticky bombs are to complete scorched earth?

Worst case scenario there are 10 hexagons per floor. Each floor costs 1 more per pick, for example floor 1 cost 1 per pick, floor 2 cost 2 per pick. The worst-case scenario in floor 1 is 10. For floor 2 is 20, etc. That worst case total comes up to 12750. If you are average and can get it in 5 clicks per round 6375. Best case is 1 pick per round is 1275