User manual LEXIBOOK PLC490

[. . . ] Example: Press "5", then the "00" key and the calculator will display "500". The "+/-" key allows you to change a positive number to negative, or vice versa. The " - " sign appears to the left of the screen when the number displayed is negative. For example, if you enter "20 + +", the calculator will display "40", which is the result of 20+20. [. . . ] To delete the memory content, press twice on "MRC", the caption "MEMORY" will disappear. Tax calculations In order to set the tax rate, press the "%/TAX RATE" key for 3 seconds, the default tax rate (5%) will be displayed, then the calculator will display zero. You will be then able to enter the new tax rate and confirm it by pressing again on "%/TAX RATE". Calculation of the "MU" margin rate Example Margin from 20 to 120 Rate of 20 % over 200 Margin rate from 200 to 150 Press 120 ­ 20 MU 200 MU 20% 150 ­ 200 MU Display 83. To modify the exchange rate press "HOME/EXCH RATE" for 3 seconds, enter the new exchange rate and confirm it by pressing again on "HOME/EXCH RATE". Calculation review "100 STEPS CHECK" & "AUTO REVIEW" "CORRECT" Calculations can be reviewed step by step. Prior to proceeding with the review of the calculations, the latter must have been finalised. Keys and can be used for any calculation: additions, subtractions, multiplications, divisions, percentage, tax calculations, conversion to euros, memories. The key allows you to go back step by step to the first calculation, whereas the key takes you step by step to the last calculation. press on "AUTO REVIEW" for an automatic recall of all last calculations. Press on C/CE to stop the recall and return to the screen before using the and keys. To modify a calculation during the review, once the calculator displays the calculation you wish to modify, follow the steps given next: · press on "CORRECT" · Enter the new value or press the new calculation key or both. ⷠPress "CORRECT" again in order to validate the modification. You can modify as many steps as you wish as long as the "CORRECT" key is pressed once for edit the calculation, and then again to finish editing it. Notes: No additional step can be added while reviewing the calculations. Should an error occur while a calculation is being modified, all steps will be deleted from the memory and it will not be possible to review them. Using the results from two calculations: "ANS/CHECK" Comparing the results from two calculations: The "ANS/CHECK" key allows you to view the result from the one before last calculation, and also that of the last calculation. Make two calculations ending with "=", then press on "ANS/CHECK" in order to obtain the result from the one before last calculation, and press once more on "ANS/CHECK" to get the last calculation. Example The one before last calculation: The last calculation: Bring back the one before last result Bring back the last result Press 5 x 10 ­ 20 = 5 x 20 ­ 20 = ANS/CHECK ANS/CHECK Display 30 GT 80 GT 30 CHECK 80 ANS In order to delete the error message and any other calculations, press "ON/C". Handling precautions Your calculator contains precision components, never attempt to take it apart. [. . . ] Our warranty covers material or installation-related defects attributable to the manufacturer, with the exception of wear caused by failure to respect the instructions for use or any unauthorised work on the equipment (such as dismantling, exposure to heat or damp etc). Note: It is recommended that all packaging be kept for future reference. Keep this instruction manual in a safe place as it contains important information. In our constant concern for improvement, the colours and details of the product may differ slightly from those shown on the packaging. [. . . ]