Greta wanted brownies for her birthday. She made a batch for herself; one dozen cream cheese swirl brownies. At her office, they threw her a party and sent her home with 1/2 a dozen brownies. Wh…👇

Greta wanted brownies for her birthday. She made a batch for herself; one dozen cream cheese swirl brownies. At her office, they threw her a party and sent her home with 1/2 a dozen brownies. When she arrived home, her friends were there to throw her a surprise party and had 4 dozen brownies waiting. During the party, 1 1/2 dozen brownies were eaten. How many individual brownies did Greta have left over from the entire day?