Pounds to Kilograms (lb to kg) — Conversion & Practice

The Pittsburgh Steak Company hosts a burger eating competition that challenges competitors to eat a $3 \text{ pound}$ burger with a one-pound bun. In total, the meal weighs about six pounds. Derek, Sarah, and Alex all decided to attempt the challenge. Sarah ate $2.5 \text{ pounds}$ of food. Alex ate $1.36 \text{ kg}$ of food, and Derek ate $32 \text{ ounces}$ of food. Who ate the most?