6. Lisa and three friends make a plan to go hiking on Sunday. On Saturday, Lisa goes to the store and buys two bottles of water and three packs of trail mix for each person. The bottles of water cost $1.50 each, and the packs of trail mix cost $3.75 each. a. Can Lisa go through the express checkout lane for customers with 15 or fewer individual items? b. Write a number sentence to show how you found the total number of items Lisa bought. c. Write a different number sentence that shows a different way to find the total number of items. d. Explain how you know which operations to use. e. Lisa has $60. Does she have enough money to pay for the items?