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Since MCmmo came back i have been wondering if theres was ever going to be a tutorial or anything like that and since there isnt i did some reaserche and here it is:

1.value of common blocks:
-dirt 4
-sand 4
-gravel 4
-sandstone 3
-stone 3
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2.experience per level:

the formula to know how much experience is needed for the levels to come is -1000 + (CurrentLevel * 20)-

exemple: you are level 23 and u want to know how much exp is needed for level 24 so 1000+480(20*24)
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3.experience table:

1- 1020 exp-
2- 1040 exp
3- 1060 exp
4- 1080 exp
5- 1100 exp
10- 1200 exp
20- 1400 exp
30- 1600 exp
40- 1800 exp
50- 2000 exp
100- 3000 exp
200- 5000 exp
300- 7000 exp
400- 9000 exp
500- 11000 exp
1000- 21000 exp
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thanks for reading and i hope this helped :D