I need help with what converter I need to buy for my monitor...?

My mom's office gave her their old computer and she gave it to me. However, I believe this computer was set up for dual monitor and they didn't provide the cord for it. What do I need to buy? I know it is a DVI to VGA (i think) but which type because they holes on this don't match the cords I was look... show more My mom's office gave her their old computer and she gave it to me. However, I believe this computer was set up for dual monitor and they didn't provide the cord for it. What do I need to buy? I know it is a DVI to VGA (i think) but which type because they holes on this don't match the cords I was look at. Thanks.
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