Where did they say "selfish"? This wouldn't be a problem if it was a case of choosing between A) paying $15 to the restaurant or B) $15 to the restaurant plus

Where did they say "selfish"? This wouldn't be a problem if it was a case of choosing between A) paying $15 to the restaurant or B) $15 to the restaurant plus $5 in delivery. However, in reality you're choosing between paying A) $15 directly to the restaurant or B) $12 to the restaurant and $8 for delivery. Hopefully the added volume of orders makes up for the $3 (made up numbers by the way), but I'm not so sure.