The user has 2 statistics:
L - Level
P - Points
Formula:
A = R // 50 > 0
B = S // 50 > 0
C = (S+R) // 100 > 0
L = 1 + A + AB + ABC
M = ...
P = R * M
Variables and marks:
R - Number of Referrals
S - Number of Second layer referrals
// - Integer division
> - Greater than - 0, or 1 if greater
== - Equals to