Need math help (playing a MMORPG Crystal Saga)

[krokrok]

Im confused about how to calculate this. Normally it seem easy if i count it one by one...but...here it goes

I need 3 Chipped gems to convert to 1 Flawed gem at the cost of 0.72 per convert
I need 3 Flawed Gems to convert to 1 Scratched Gem at the cost of 2.88 per convert
I need 3 Scratched Gems to convert to 1 Normal Gem at the cost of 6.48
and so on based on this table below until it reach the maximum level of Immaculate gem. Every step is 3x each = 1 higher level:

Chipped	0.72
Flawed	2.88
Scratched	6.48
Normal	11.52
Shining	18.00
Excellent	25.92
Superior	35.28
Flawless	46.80
Perfect	58.32
Immaculate

The problem is when someone asked me how many chipped i needed to make 1 or 2 immaculate gems? or how much the entire cost to make 1 Immaculate gems

I need a formula to count it.

**I got this problem when playing MMORPG Crystal Saga. Say, at now i got 353 chipped, i dont know if it can reach 1 immaculate or not....confuse pls help!

 

[krokrok]

How many Gems i need to make 1 Immaculate?

I don't know if this is count toward algebra or not, but i think so. I got this problem when playing a MMORPG Crystal Saga. I got many chipped level gems that I don't know if it can reach the level of Immaculate and at what cost should i prepare to obtain 1 during in-game synthesis.

I need 3 of each level of gems to create higher one. eg: I need 3 chipped to create 1 Flawed gem cost @0.72, I need 3 Flawed gems to create 1 Scratched gem cost @2.88 and so on by referring below table:

Chipped	0.72
Flawed	2.88
Scratched	6.48
Normal	11.52
Shining	18.00
Excellent	25.92
Superior	35.28
Flawless	46.80
Perfect	58.32
Immaculate

1: The problem is how many chipped gems to make 1 immaculate level?
2: Up to what level can i get from 353 chipped gems?
3: How much the cost to convert from chipped level to Immaculate level i should prepare?

Is there is a good formula to use? i try to count one by one level in Excel but got confuse at certain level when including cost. Please help!