COMPANY’S MAIN PRODUCTS
Product Brand Date of Present
introduction volume of sales
Heaters A 1998 $79,000
B 1999 $82,000
Freezers C 1997 $79,936
D 2001 $88,000

A．B Brand Heaters were first put on the market in 2001．and now it has the biggest volume of sales．
B．D Brand Freezers were introduced to the market late but it has the biggest volume of sales．
C．Each product has two brands and with the same volume of sales．