Answer
There are $100$ more calories in a Whopper than there are in a 6-inch Turkey Breast and Black Forest Ham sandwich.
Work Step by Step
A 6-inch Turkey Breast sandwich has $280$ calories and $4$ grams of fat.
A 6-inch Black Forest Ham sandwich has $290$ calories and $5$ grams of fat.
A Whopper has $670$ calories and $40$ grams of fat.
$670-280-290=100$
There are $100$ more calories in a Whopper than there are in a 6-inch Turkey Breast and Black Forest Ham sandwich.