Assignment:
Find the cost per ounce of each of the following sets of products, and tell which one is the better buy for each pair. You must show your work for both parts.
a. 6 ounce tube of toothpaste for $2.30 or a 12 ounce tube of toothpaste for $4.10.
b. 4 ounce can of spray for $2.99 or a 6 ounce can of spray for $4.99.
c. 20 ounce bottle of water for $1.19 or 32 ounce bottle of water for $1.99
Provide complete and step by step solution for the question and show calculations and use formulas.