Discussion Help needed with the FSD fuel consumpion formula

I'm trying to figure out the fuel consumption formula and I'm having real trouble with the math

Here the formula I know

FuelUsed = (LC / 1000) * ((D * M / OM) ^ PC)

LC = FSD Rating (A=12, B=10, C=8, D=10, E=11)
D = Distance to be jumped in ly
M = Ship mass included cargo and fuel (before jump)
OM = FSDOptimalMass
PC = FSD Class (2=2.00, 3=2.15, 4=2.30, 5=2.45, 6=2.60, 7=2.75, 8=2.90)

Here are my number
LC = 12 (6A FSD)
D = 59.802 (Journal)
M = 510.089996 (Journal) + 31.806305 (Status.json)
OM = 2901.599854 (Journal)
PC = 2.60 (6A FSD)

The fuel used according to the Journal is 4.320926
The fuel used according to the formula is 6.3708895888671071

12 / 1000 * ((59.802 * (510.089996 + 31.806305) / 2901.599854) ^ 2.60)
0.012 * ((59.802 * 0.18679638090313685) ^ 2.60)
0.012 * 11.17079717076939 ^ 2.60
0.012 * 530.90746573892557
6.3708895888671071

What I'm doing wrong?
 
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