Why does the shopping apps and shopping centre place the tag of 99 for example 199 ,99 ,299 ,999 ,49 etc explain

Why does the shopping apps and shopping centre place the tag of 99 for

1.	Why does the shopping apps and shopping centre place the tag of 99 for example 199 ,99 ,299 ,999 ,49 etc explain
Answer» Its because if it is not 99 it will COME into the next TAX BRACKET(GST) and it will be costlierExplanation:HOPE it helps