CFAI specifically states we aren’t responsbile for memorizing or deriving formulas in section 4-6. Then right off the bat EOC 1 requires knowing these formulas. Think it’s safe to ignore the calculation and just know what’s going on conceptually? Why would they give an EOC requiring we know the formula if we won’t be tested on it?
Even if there’s the slightest possibility, it’s a super complex formula that’s what, between 5-10% of the test? I’d spend more time on other areas for sure.