Low-order products are products that are repeatedly purchased and are low-priced while Middle-order products are time-to-time items that are purchased but not as often as low-order products. Also, High-order products are the most expensive items or have a limited market and are scarcely purchased.
A perceptual region is one created in the mind of the viewer according to associated feelings and ideas.<span> It is a highly subjective way of looking at a geographic region .</span>
