Aunt Pam is pricing cakes for a baby shower she is throwing. She wants one large cake shaped like a duckling and also some cupcakes in pastel colors. Oakdale Bakery charges $2 for each cupcake, plus $40 for the large cake. Gabriel's Sweet Shoppe charges $30 for the large cake and $4 for each cupcake. If Aunt Pam orders a certain number of cupcakes, the cost will be the same at either bakery. How many cupcakes would that include?