When you enter a number as a constant value in a cell, you can include parentheses, Dollar signs, Percent signs and commas. To format characters in a cell, select the cell by clicking in it. From the Format menu, select the Cells option. This will present you with a variety of options for how the characters in the cell could be formated. One of the main purposes of using a spreadsheet application is to allow the computer to do the computational work for you.
Formulas allow the user to define a computation for the computer to execute.
By defining a formula in a cell, the computer will perform the appropriate calculations and give the result in the same cell. This signifies that you would like the result of the formula to be placed in this cell. Click the next cell or type the reference address. Continue as needed. Press Return or click the check button to evaluate the formula.