22.5×(1−0.35)×(1+((12,595,373÷1,374)÷18,000))×(1+(2×(0÷1,374)))×1.8×0.8=31.79

22.5×(1−0.35)×(1+((12,595,373÷1,374)÷90,000))×(1+(2×(0÷1,374)))×1.8×0.8=23.21

Thats with the op he posted and both the provided formula and the one gerdy said it is. Neither = anywhere near 0.

Anyone have an actual explanation here? We're just looking for a way to avoid it but need to know the actual math.