1. **State the problem:** Yana buys 6 packs of pencils at 3 each and 4 sets of markers at 5 each, then uses a 10 off coupon. We need to find how much she will spend. 2. **Write the expression:** Total cost before coupon is $$6 \times 3 + 4 \times 5$$ 3. **Calculate each part:** $$6 \times 3 = 18$$ and $$4 \times 5 = 20$$ 4. **Add the costs:** $$18 + 20 = 38$$ 5. **Apply the coupon:** Subtract 10 from 38 6. **Show intermediate cancellation:** $$\cancel{38} - 10 = 28$$ 7. **Final answer:** Yana will spend **28**. This uses the order of operations: multiplication before addition, then subtraction last.