𝘌𝘷𝘦𝘳𝘺𝘰𝘯𝘦 knows SUM. After all, it was almost certainly the first function you learnt in Excel. While it's useful for calculating a whole column of numeric values, that isn't always what you want. A frequent task is to total up a column based on one or more conditions, and there are two functions for this: SUMIF and SUMIFS. 𝗦𝘆𝗻𝘁𝗮𝘅𝗲𝘀 =𝚂𝚄𝙼𝙸𝙵(𝚛𝚊𝚗𝚐𝚎,𝚌𝚛𝚒𝚝𝚎𝚛𝚒𝚊,[𝚜𝚞𝚖_𝚛𝚊𝚗𝚐𝚎]) =𝚂𝚄𝙼𝙸𝙵𝚂(𝚜𝚞𝚖_𝚛𝚊𝚗𝚐𝚎,𝚌𝚛𝚒𝚝𝚎𝚛𝚒𝚊_𝚛𝚊𝚗𝚐𝚎,𝚌𝚛𝚒𝚝𝚎𝚛𝚒𝚊,...) In the

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