🧮 SUM, SUMIF, SUMIFS — Excel ke sabse useful aur confusing formulas! Is video mein aap seekhenge in teeno formulas ka clear difference, parallel use, aur real-life salary + department example jisme bataya gaya hai kis data ke liye kaunsa formula perfect fit hota hai. 👨🏫 Covered in this video: =SUM() → Basic total calculation =SUMIF() → Condition-based sum =SUMIFS() → Multiple condition based sum Real-life salary & department example Parallel comparison for better understanding Full logic breakdown in simple Hindi 🎯 Best for: Excel beginners, students, job seekers, office professionals ✅ Aap is video ke baad: Har SUM formula ka use confidently kar paayenge Apne data ke hisaab se best formula choose kar paayenge Interview ya office work mein galti se bach paayenge