[. . . ] These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. [. . . ] When the Add mode is activated, the decimal point is automatically positioned according to the decimal selector setting. Use of , , and will automatically override the Add mode and decimally correct answers will be printed at the preset decimal position. NON-ADD / SUBTOTAL KEY: Non-Add ­ When this key is pressed right after entry of a number in the Print mode, the entry is printed on the left-hand side with "#". This key is used to print out numbers not subject to calculations such as codes, dates, etc. subtotal ­ Used to get subtotal(s) of additions and/or subtractions. When pressed following or , the subtotal is printed with "" and the calculation may be continued. By pressing this key even in the Non-print mode, the displayed number is printed with "P". tOTAL KEY: Prints the total of addition and subtraction with " ". This key also serves as a clear key for the calculation register and resets an error condition. CLEAR ENTRY KEY: Clears numbers entered prior to use of a function key. fIRST RECALL MEMORY KEY FIRST RECALL AND CLEAR MEMORY KEY MULTIPLE USE KEY: Performs mark-ups , percent change and automatic add-on/discount. TAX-INCLUDING KEY: This key is used for calculations with the tax/discount rate. ⷠA maximum of 4 digits can be stored (decimal point is not counted as a digit). : First memory symbol Appears when a number has been stored in First memory. [. . . ] 00 *2 : Press to clear the memory before starting a memory calculation. M *3 : Press to clear the memory before starting a memory calculation. *4: Press then to clear the contents of the First and Second memories before starting the operation. [. . . ]