How to compare my Investopedia stock market returns with the s&p 500 returns at a $100 level when my portfolio is changing as I buy different stocks through a period of time? So basically I want to create a chart with 2 lines for each.

So let's say I have $10,000 to invest when trading starts on Monday and I make the following trades through the week. I buy $4000 of apple stock on one Monday, then $4000 of Delta airlines stock some other Tuesday, and $1000 of Facebook also on a Friday (so I have 1,000 to spare). When the trading "ends", how would you answer the above question?

I am not well versed in Excel so as much detail you could provide would be greatly appreciated. Thank you for taking the time.