Don’t worry! While some Integrated Reasoning questions do include what look like small spreadsheets (including sorting functionality), they are not anywhere near as sophisticated as a real-world spreadsheet. They are really just tables of numbers that make use of the GMAT’s computer-based testing environment to make your job a bit easier hence the sorting functionality and the ability to pull up an on-screen calculator when needed. Someone who has never used Excel can become familiar with this functionality in mere minutes. GMAC is not interested in testing your ability to manipulate numbers in a spreadsheet