Answer:
0.856p dollars
Explanation:
Original price of TV: p
Discount: 20% of p
Discounted price: p - 20% of p = p - 0.2p = 0.8p
7% sales tax on the discounted price of 0.8p: 0.07 * 0.8p = 0.056p
Add the 7% tax to the discounted price: 0.8p + 0.056p = 0.856p
Answer: 0.856p dollars