abc printing sells novels and comic books. for januraPROBLEM $2(8\mathrm{.}5$ Marks$)$: ABC Printing sells Novels and Comic books. For January the following

information is available:

Required:

a$.$ Compute the market$-$share variance and market$-$size variance. $($Round intermediate calculations to

four decimal places$)7$ marks

b$.$ Compute the total sales$-$quantity variance. $1\mathrm{.}5$ marks