Anchor: Consequently, their cost to the Postal Service is far less than for full-time employees.
Entailed: The postal service cost is less for full time employees 
Contradiction: The postal cost is more for full time employees
Contradiction: The adults are inside a kitchen.
Contradiction: People are on the street.
Contradiction: Sewage poured into upstairs windows from the streets while people whispered to each other.
Contradiction: a family is camping