need formula and answer for compound interest? See that holding period is in months. thanks

G e, and Standard Deviation calculations owing investments: Purchase Price Sales Price Holding period (months) 400.00 485.00 4 Dividends Received: Month 3 4.50 Holding Period Return: 22.4% Annualize the Holding Period Return 67.1% Simple Interest Compound Interest standard deviation of returns for the