Computation	Description
API3 × 5/8 = API3NEW	Item 3 is converted to a 6-point scale by multiplying its value by 5/8.
API4/2 = API4NEW	Item 4 is converted to a 6-point scale by dividing its value by 2.
(API1 + API2 + API3NEW +API4NEW)/4 = UNSCALEDMEAN.	All four items are averaged.
UNSCALEDMEAN × 4/5 = APIFINAL	This average is converted to a final composite score on a 4-point scale by multiplying it by 4/5.