The first is the consumer Wants, they must be in want of those products or services before. However, there is no requirement, but considered the demand because the demand is a demand that must be bought and traded up really occurred. Willingness to pay is that consumers are willing to sacrifice their money or property in order to Exchange various goods or services with them for use in the treatment of their needs. Purchasing power or ability to pay is considered an important element is whether that person will want or need the product or service in any much without the ability to purchase or to supply were already trading really won't happen. That is the only requirement would be likely to buy (potential demand) is the ability to purchase is usually determined by the size of the property, or the income that the person has received or by the relationship is in the same direction.
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