Understanding TON Gram.

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By today it's known
1st ICO got 850$ with average 0,37$ per 1 GRAM;
2st ICO got 850$ with average 1,33$ per 1 GRAM;

As a result here are currently 0,85*10^9/0,37 +  0,85*10^9/1,33 = 2936395041 GRAMs sold?

Price of Nth gram -> Pn = 0,1*(1+10^-9)^n. It was planned to sell 44% -> 2,2*10^9th GRAM cost is 0,9$.
So reported price correlate with ~ 2,93*10^9th GRAM cost. But it means 58,72% (2936395041/5000000000*100%) sold already?