An appliance store bought a clothes dryer and marked it up 20% from the original cost of $866.71. Later on, Jackie purchased the dryer and paid 4% sales tax. How much, including tax, did she pay for the dryer?

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?