Net sales $($in millions$)$ $ $5,935$ $ $5,450$ $ $4,840$

Number of stores $484481466$

Square feet of selling space $($in millions$)15\mathrm{.}513\mathrm{.}911\mathrm{.}5$

Average net sales of comparable stores $($in millions$)$ $ $12\mathrm{.}6$ $ $12\mathrm{.}8$ $ $13\mathrm{.}2$

Required:

a$.$ Calculate the following statistics for Knauss Supermarkets:

a$-1.$ The percentage change in net sales from year $1$ to year $2$ and year $2$ to year $3.$ Hint: The percentage change is computed by dividing the dollar amount of the change between years by the amount of the base year. For example, the percentage change in net sales from year $1$ to year $2$ is computed by dividing the difference between year $1$ to year $2$ net sales by the amount of year $1$ net sales, or $($$$5,450$ $$4,840)-$: $$4,840=12\mathrm{.}6\%$ increase.

a$-2.$ The percentage change in net sales per square foot of selling space from year $1$ to year $2$ and year $2$ to year $3.$

a$-3.$ The percentage change in comparable store sales from year $1$ to year $2$ and year $2$ to year $3.$