Kira drives a truck for a soft drink company. Her truck is filled with 15 -ounce cans and 70 -ounce bottles. Let c be the number of 15 -ounce cans the truck is carrying, and let b be the number of 70 -ounce bottles. Suppose the truck can carry at most 4000 pounds ( 64,000 ounces). Using the values and variables given, write an inequality describing this.