Excel files with tabs for each month

Hello everyone. First let me say that this is not a problem. I'm coming at this from a purely aesthetic perspective.

I've inherited and excel file where teams document their overtime for the month. There's one tab for every month. All tabs are exactly the same format. My leaders would like a tab added that shows the totals for the year.

As I look at this file, it look .... plain. And that's fine for functional purposes, but I'd like to jazz it up a bit. Ideally, I'd like one tab with all months.

Can anyone makes suggestions on how I can format this report on one tab? Or perhaps point me to demos or templates that may good options? I'd like this report, as simple and basic as it is, to pop.