Lydia bought a shirt at 20% off of retail price of 40$ She paid 5% tax on the price after discount how much does Olivia pay for the shirt

Do the math. she originally had 50 dollars on her gift card and she had 12 dollars left on her gift card after she finished her shopping spree. if you subtract 50 minus 12 you get thirty eight dollars as your answer. so therefore, ciara spent 38 dollars total o