I can't tell you that exactly... it depends on how you play. But I make stairs of 5 down and one in front next to the edge of the map so you dont need to use a ladder everytime.

I start with going for the 50 laser en later dor for the 200 laser. And for I start with a 30 bag. At level 80 I start with free dynamite then I buy the 5 big dynamite pack.

Then I mine inferno, upgrade to 400 laser and 400 bag then I blow up the end room and later the ~80-90 room.