Mixed and Absolute Cell References. To avoid this problem created by the relative cell reference A7, mixed and absolute cell references can be used, which prevent all or part of a cell reference in a formula from changing as it is copied. Absolute and mixed cell references are created by adding dollar signs ($) to a cell reference. For example, in the image above, the cell reference $A$6 in the formula in cell B2 is an absolute cell reference and $A2 is a mixed cell reference.
The point of sale (POS) is the time and place where a retail transaction is completed. It is the point at which a customer makes a payment to the merchant in exchange for goods or after provision of a service.
POS is an acronym for point of sale, which is a form of retail transaction. A POS system is a sophisticated computerized cash register system, and is widely used in most transactions of this type. The cost of a POS system is based on the type of system and the amount of customization and features.The amount you spend on a POS system should be in direct proportion to the amount of revenue that your company generates. A POS system that is customized, programmed, and installed, costs between $2,500 and $6,000 each. POS system or terminal purchased from a store without programming, customization, or installation costs between $1,000 and $3,000 per terminal. The cost for multiple terminal purchases made at one time runs less.