Time for that fancy walkin'

For time:

• Walking Lunges 100 feet
• 21 Pull-ups
• 21 Sit-ups
• Walking Lunges 100 feet
• 18 Pull-ups
• 18 Sit-ups
• Walking Lunges 100 feet
• 15 Pull-ups
• 15 Sit-ups
• Walking Lunges 100 feet
• 12 Pull-ups
• 12 Sit-ups
• Walking Lunges 100 feet
• 9 Pull-ups
• 9 Sit-ups
• Walking Lunges 100 feet
• 6 Pull-ups
• 6 Sit-ups

My time was 18+ mins.