Helppppppppp Ms. Goynes, Mrs. Weatherly, and Ms. Washington had $400 to purchase raffle prizes for their classes. They bought 23 wireless mice and 23 headphones. Each wireless mouse cost $3.49, and each headphone cost $9.99. How much money did they have left after these purchases?

400 - 23*4.49 - 23*9.99 = 66.96

I'm also new here but I need an answer asap