A candy store makes a 13-pound mixture of gummy candy, jelly beans, and hard candy. The
cost of gummy candy is $1.00 per pound, jelly beans cost $2.00 per pound, and hard
candy costs $2.00 per pound. The mixture calls for three times as many gummy candy
pieces as jelly beans. The total cost of the mixture iS $20.00. How much of each ingredient did
the store use?