To be considered “Affordable”, the HPI ratio needs to be 3.0. That means in the examples depicted in the advertisement, the 3-room, 4-room, and 5-room BTO flats have to be sold at $108,000, $180,000 and $252,000, respectively.
Is the comma before “respectively” needed?
To be considered “affordable,” the HPI ratio must be 3.0. This means that in the examples shown in the ad, the 3-bedroom, 4-bedroom, and 5-bedroom BTO apartments must sell at $108,000, $180,000, and $252,000, respectively.
To me, the comma is not necessary as you suspect. I do not use it either.