The couple has been offered a 20% incentive on the cost of the holiday if they choose to rebook. Since the holiday is worth £1200, this means they would receive an incentive of 20% * £1200 = £240.
The couple also has the option to use a discount code, SUMMER, which gives them an additional £100 off the cost of the holiday.
So, the final total price of the holiday would be £1200 - £240 - £100 = £760
It's important to note that the couple will only receive the 20% incentive if the holiday they rebook is more expensive than the original holiday, if not the incentive will not be applied.