➕ SUMIF ➕ SUMIFS ✖ SUMPRODUCT 📐 AVERAGE 🔢 COUNT / COUNTA 📊 SUBTOTAL 📊 COUNTIF 📊 IF + COUNTIF COMBO 📊 AVERAGEIF 📊 DUPLICATE Detection 📊 WILDCARD Criteria (*, ?) 📊 CONDITIONAL FORMATTING 📊 ABSOLUTE REFERENCE
