My single price grid component challenge solution

This is the first solution that I send to Frontend Mentor. I have discovered this site recently. I am a newbie in frontend development but I've loved to do it :) I guess this solution is going to appear strange because it has some duplications. Maybe I should have used LESS, so classes can refer to other classes. I am a complete newbie, and I know people do that, but I didn't fell comfortable in using more than one class in the HTML elements and overriding here and there. I think it makes it harder to find where things come from when looking at the CSS.