Beethoven's Ice Cream Shoppe had a sale on Friday. All of their ice cream cones were $2.50 and all of their sundaes were $4.00. At the end of the day, the manager counted the total number of items sold at 225 cones and sundaes. The total sale was $675. However, in his haste to serve all the customers, he forgot to count how many of each item were sold.