First we need to find out the price of the tickets without the booking fee and credit card fee.4x15=602x10=2060+20=80 (This is the price of 6 tickets without fees)Now we calculate the booking fee, which is 10%. 10% from £80 is 0.1x80=8; the booking fee is £8Now we add the booking fee to the ticket price: 8+80=88;Then you calculate the credit card fee, which is 3%. 0.03x88=2.64;Then you add the card fee to the rest of the equation; 2.64+88=90.64So the total ticket price including fees is £90.64