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===The Solver add-in===
===The Solver add-in===
To use the calculation spreadsheet, an additional add-in must be enabled in your Excel program.
To use the calculation spreadsheet, an additional add-in must be enabled in your Excel program.
#Go to ‘File’ in you menu toolbar and select ‘Options’ from the menu,
# Go to ‘File’ in your menu toolbar and select ‘Options’ from the menu,
#Choose ‘Add-ins’ and then at the bottom of the window, for ‘Manage Add-ins’, select ‘Go’.
# Choose ‘Add-ins’ and then at the bottom of the window, for ‘Manage Add-ins’, select ‘Go’.
#Check the box for the ‘Solver’ add-in and then ‘OK’.
# Check the box for the ‘Solver’ add-in and then ‘OK’.
#Your new Solver add-in appears on the right end of the ‘Data’ toolbar in the main Excel window. It is useful for solving all kinds of iterative equations.
# Your new Solver add-in appears on the right end of the ‘Data’ toolbar in the main Excel window. It is useful for solving all kinds of iterative equations.
===Performing calculations===
===Performing calculations===
#Save a new copy of your spreadsheet.
#Save a new copy of your spreadsheet.