Angelita owns a small Native American gift shop in Arizona. Recently, she acquired a large collection of hand-woven Navajo rugs from another shop owner who was retiring. This owner told Angelita that she would sell about 40 rugs a month at $150/rug but only 20 rugs per month at $220/rug.

7. Graph the cost and revenue functions on the same graph. Determine the break-even point and interpret its meaning in the context of this problem. How many rugs should be sold in order for Angelita to make money?