QUESTION $3(20$ Marks$)$

Study the information provided below and answer the following questions.

INFORMATION

Paulshron Enterprises $($PE$)$ makes three different types of high$-$end air conditioners: the ceiling type $($A$1$X$),$ the cassette type $($A$2$X$),$ and the wall$-$mounted type $($A$3$X$).$ The data provided below relates to the three types of the air conditioners for the current year: