Selena purchased some gifts for her nieces and nephews online. She bought 3 dolls each priced at $19.99 each and 4 remote control cars priced at $21.99 each. Selena was able to get an online coupon for $3 off on each remote control car that she purchased. There was no sales tax, but the shipping charge was $10.50. What was the total amount Selena paid for her online purchase?a.$135.93b.$144.93c.$146.43d.$155.43