barelystayingsane on "Leverage Formulas"

Becker provided a couple formulas in its questions on leverage in BEC:

Operating leverage = Q(S - VC)/(Q(S - VC) -FC)
Financial Leverage = EBIT/(EBIT - I - [P/(1-t)])
Total Leverage = Q(S - VC)/(Q(S - VC) - FC - I - [P/(1-t)])

Are these formulas that I should memorize for BEC? Becker didn't include them in the book. They just provided them for us within the question.

Thanks!