LibreOffice Calc has become my go-to tool for any sort of calculations. It’s so easy to use and does exactly what I need it to do without any fuss. I can easily open a document, start writing formulas, and produce spreadsheets within seconds. And if I want to edit the formula or add new ones, I can just copy them into the next cell and start working again. There are quite a lot of useful features and options available in Calc. For example, I could look at creating a bar chart with specific values (or variables) highlighted, and the total amount in brackets. I could then apply a colour to each section and see the totals at the bottom of the graph. I can even select the exact ranges of numbers and automatically fill in the rest. This allows me to complete complex calculations in a fraction of the time. Another great feature is the option to have multiple graphs in a single document. This means I can have two separate charts displaying different information in a single document. I can choose to display them on separate tabs or even have a combination of the two. If I’m working with many different graphs, having a way to group them together makes it quicker to get back to the original calculations.