# Excel 2010: Using Array Formula

Excel provides a way to deal with arrays. Sometimes it becomes a frantic need to apply formula, or do any other operation using arrays. By using arrays you can deal with two list of data simultaneously. Excel **Array** formulas empowers user to deal with series of data/values rather than handling single data value. In this post we will apply simple array operation over the data cells for finding out SUM of values.

Launch Excel 2010, and open a datasheet on which you want to apply Array operation. To start off with using array, we have included a datasheet, containing fields, *Name, Item, and Price *as shown in the screenshot below.

Now we need to evaluate the sum of all the product price, for this we need to multiply each item sold with its respective price. For example, we need to multiply each item with its price and show the result (4*400=1600, 3*233 and so on).

For this, we need to perform array operation over it. First we will give cell a label *Total Sale, *beneath the table.

Now we will write a formula in the cell, adjacent to *Total Sale. *

The syntax of simple SUM formula is;

=SUM(table_range*table_range)

But this would not return us the desired result, For evaluating the correct result we need to evaluate the formula by apply array formula over it. To let Excel know, that we need to use array. we will press hotkey (Ctrl+Shift+Enter), after applying the formula.

=SUM(C2:C11*D2:D11)

In Excel there is a designated way to use array, so after writing the formula, we will use Ctrl+Shift+Enter hotkey.

{=SUM(C2:C11*D2:D11)}

This will evaluate the sum of all the products, by multiplying number of units purchased of each product with its price.

Now we will simply convert the cell value to currency value, so we will move to *Home* tab, and From *Number *group, click the drop-down button, click *Currency, *as shown in the screenshot below.

This will the change the value in to default currency, as shown in the screenshot below.

You can also check out previously reviewed guides on Using REPT formula to create histogram & Using Payment Function In Excel.

I have a similar concern in my company. We do a lot of Random Sampling in order to choose the products we are going to inspect in order to approve or reject a product lot that a supplier is wanting to ship to us. For example, XYZ inc is building 415 “jimibars” that they want to ship to us. We need to have them pick 30 “at random” and run them through an inspection process. I would like to send along with my Inspection Forms, a list of which units to pick. Can you or even better, can I modify the Lottery array in this example to this problem that I have? In other words, how do I increase the lot size from 49 numbers to 415 “jimibars” and the random number output from 6 to 30? I appreciate any help you could give me. My email address is saartrk@hotmail.com.

Thanks,

John Saar