Here is how the $69.00 installation works.
Purchase: Stainmaster Ultralife for one room in the house.
Size: 12x10 =120 square feet
Installation Cost: $69.00
Save: $27.00

OR

Purchase: Stainmaster Ultralife for all the carpeted areas in the house.
Size: 2000 square feet
Installation Cost: $69.00 Only
Save: $1531.00
Simple as that. the more you purchase the more you save.