First, you should take 30% of the original price, which would be 600. (You should be able to use a standard calculator for this). Next, since the price increases by 30%, just put 600+30% and your answer should be 780.
PS I just tried this problem on my calculator, so I don't know if I did it right, but it makes sense to me. I also searched it up and it also says it's 780, so I'm guessing it's correct. The way I showed you is easier though.
