Aboat is marked up 20% on the original price. the original price was $50. what is the sale price of the boat before sales tax?

So,

The original price was $50.

The price was increased by 20%.

If you find 20% of $50 and add the result to $50, you will get the markup price.

20% --> 0.2
50(.2) = $10

10 + 50 = 60

The marked-up price of the boat is $60.

The answer for you question is b