Paul uses 1 can of frosting to frost a layer cake.  He uses a half can of frosting for a single cake, or a single pan of brownies, or a dozen cupcakes.  For Saturday, he needs to have 3 layer cakes, 6 dozen cupcakes, 12 single cakes and 18 pans of brownies ready and frosted for customer pick up.  How many cans of frosting will he need?
Can you solve this problem?