Excel Project help!

Hello everyone,

I have been asked by my college to submit a project on excel. Being a student of nutrition I don't have much knowledge in MS Excel, only the basics!
So please help me out with this project as I don't have any clue about it & how to do it!
The description of d project & the guidelines are as follow:

"Suppose you are a  manager of a Cafe House. Create a worksheet using excel maintaining the monthly expenses of the Cafe house under various heads, for a year. your assignment should contain:

1. Formulas that automatically calculate.

2. You must find the Avg. expenses per month.

3. Automatically find the month when the min. amount was spent.

4. Create a chart for head wise expenditure per month."

Thank you in advance!