A luxury apartment condo recently opened up along the Biltmore`s waterfront. Within the first two months, 80% of the standard units in the first ten of the condo`s twelve stories were sold. Nonetheless, only two of the eight penthouses, all of which are located in the top two stories of the building, have sold. In order to sell the remaining six penthouses, the corporation that owns the property, should drop the rate of the penthouses by 20%.Which of the following, if true, would argue against the proposal above?
【选项】After the proposed discount each penthouse will only be 15% more costly than a standard unit.