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It can be 32 and it can be 30 depending on which shuttle

in the case of 32 here's the calculation:

Glycolysis 2 ATPs/glucose
Glycolysis give 2 NADH
if NADH enters through G3P shuttle it will yield 3 ATPs
so 2x3= 6 ATPs

Each glucose gives two pyruvates
Each pyruvate entering TCA will give off 12ATPs
so 12x2 = 24

24+6+2 = 32

am sure you'll understand how malate shuttle gives 30 ATPs instead
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