The number of croissants and cakes that each eats for breakfast and lunch respectively is 7+18=<<7+18=25>>25
After eating 30 pizzas before bedtime, the number of croissants, cakes, and pizzas that each person have in total for the day is 25+30=<<25+30=55>>55
Since each person eats a total of 55 croissants, cakes, and pizzas for the day, the two consume a total of 55+55=<<55+55=110>>110 of the food in a day.
#### 110