for several consecutive weeks you have observed the sales $($in number of cases$)$ of canned tomatoes at Mr$.$ D$\text{'}$s supermarket. Each week you keep track of the following:

Was a promotional notive placed in all shopping cars for canned tomatoes?

was a coupon given for canned tomatoes?

was a price reduction $($none$,1,$ or $2$ cents off$)$ given