Learn how to create useful spreadsheets. TL;DR: Through July 21, master the much-loved, much-hated Microsoft app with this Microsoft Excel training bundle. It's on sale for just £23.60 (reg. £314.14) ...

The following content is brought to you by Mashable partners. If you buy a product featured here, we may earn an affiliate commission or other compensation. TL;DR: Through July 21, master the beloved ...

While gut instinct still has a place in business, most decisions today are made with data. Whether you work in sales, marketing, finance, or science, you need to know how to crunch the numbers.