Project limit exceeded!

I was working on my project as part of Data Analysis course and has almost reached the final part. But I exceeded my time limit. I did not notice that there is a cap on time. What are my options.If I have to upgrade, how much is the price and how many more time will I get. Is there some other way.Please help!

The Cloud Free account has 25 compute hours per month. For $5, the Cloud Plus account has 75 hours per month.