Answer:
You need to first use the Sum function to add up all the costs of September.
Then divide each September cost by the grand total that you got. After that format the last column to be percentages.
Look at the attached file for the formulas used.
Change the color to black and white
Answer:
OC. It will be a more positive experience if she spends time with her friend in person.
Explanation:
You should always spend time with people in person rather than online whenever you get the chance.