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. 93 b. $144. 93 c. $146. 43 d. $155. 43.