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.
Place of Service (POS) is a required field in a health care claim. The National POS code set is defined and maintained by the Centers for Medicare and Medicaid Services (CMS). It includes such codes as 01 Pharmacy, 03 School, 11 Office, 12 Home, and so on.