hi, can you please explain how they got 312.0500 , because 0.20*1560= 312, not 312.0500???

Consider the following table: Required: a. Calculate the values of mean is in and variance for the stock fund, (Do not round intermediate calculations. Found "Mean return" value to 1 decimal place and "Variance" to 4 decimal places.) b. Calculate the value of the covariance between the stock and bond funds. (Negative value should be indicated by a minus sign. Do not round Intermediate caiculations. Round your answer to 4 decimal places.) a. Calculation of mean retum and variance for the stock fund