Lacey stopped at Littletown market to buy 20 cookies for her book club. Littletown Market sells 6 cookies for $3. On her way hom
e, Lacey passed by another store, Collegetown Bakery. Collegetown Bakery sells 12 cookies for $23. Lacey figured out she got the better deal. How much did she save by buying her cookies at Littletown Market?