Recode the invoice to clearly indentify each item on its own row, including booking fee for that item @ 15%
Remove the Blue bar at the top of the invoice page that is just waiting space.
Change the email at the bottom to orders@domain instead of admin@domain
Remove the duplicate postcode and replace the , comma before the phone number with Ph:
Change "15% + GST OF Total Booking Amount"
To "15% + GST OF TOTAL BOOKING AMOUNT" (ALL CAPITALS)