A food store makes a 11-lb mixture of oatmeal, crispies, and chocolate chips. The cost of oatmeal is $1.50 per pound, crispies cost $2.00 per
pound, and chocolate chips cost $1.00 per pound. The mixture calls for
twice as much oatmeal as crispies. The total cost of the mixture is $17.00.
How much of each ingredient did the store use?