Karina bought a camera with a regular price of $89. It was on sale at a 20% discount. There was a 7% tax on the sale price. How much did Karina spend to buy the camera?

1) we can calculate the price of this camera with 20% discount.

$89 - (20/100) ($89) = $89-0.2 ($89) = $89-$17.8=$71.2

2) now, we apply the tax on the sale price.

$71.2 + (7/100) ($71.2) = $71.2 + (0.07) ($71.2) = $71.2+$4.984=$76.184

Answer: Karina spent to buy the camera $76.184.