At Southgate Mall, mattresses are sold only at Mattress Madness  Every mattress at Mattress Madness is on sale at a 20 percent discount
So every mattress for sale at Southgate Mall is on sale at a 20 percent discount
All the food in Diane's apartment is in her refrigerator. Diane purchased all the food in her refrigerator within the past week. Ttherefore, she purchased all the food in her apartment within the past week.