You can do it through AutoSum or Some Formulas.

Explanation:
To perform a calculation in a spreadsheet, you need to use a formula. A formula is a mathematical expression that allows you to perform calculations on data in a spreadsheet. It is written using a combination of numbers, operators, and cell references.

Formulas in spreadsheets:
Formulas in spreadsheets are used to perform calculations and manipulate data. They allow you to perform basic arithmetic operations such as addition, subtraction, multiplication, and division, as well as more complex calculations using functions.

Using formulas:
To use a formula in a spreadsheet, you need to start by typing an equal sign (=) followed by the formula expression. For example, if you want to add the values in cells A1 and A2, you would type "=A1+A2" in a different cell. The formula will then calculate the sum of the two cells and display the result.

Cell references:
In formulas, you can use cell references to refer to specific cells in a spreadsheet. A cell reference is a combination of a column letter and a row number that uniquely identifies a cell. For example, the cell reference A1 refers to the cell in column A and row 1.

Advantages of using formulas:
- Formulas allow you to perform calculations quickly and accurately.
- They allow you to update calculations automatically when the underlying data changes.
- Formulas can be easily copied and applied to multiple cells, saving time and effort.
- They provide flexibility in performing complex calculations using functions.

Conclusion:
In conclusion, to perform a calculation in a spreadsheet, you need to use a formula. Formulas allow you to perform calculations and manipulate data in a spreadsheet by using mathematical expressions and cell references. They provide an efficient and flexible way to work with data in spreadsheets.

Answer b