$\backslash$table$[[\backslash$table$[[$Using the data on the right, find the average sales$],[$of the toy store chains $($in $$1000)?]],$Chain,# of Stores,Avg. Sales$/$Store$],[,$Toys $\text{'}$R$\text{'}$ Us$,145,7,233],[$a$.$ The overall average sales per store is $$,$Child World,$77,3,586],[,$Kaybee,$368,509],[($rounded to the nearest whole number.$),$Lionel,$54,3,235]]$

b$.$ The median of sales is: $

c$.$ The overall average sales per chain is $($rounded to the nearest integer$)$ is $