Possible Clues:

• "Sure thing!"
• 'I'm on it'
• "I'm on it, boss"
• 'Sure thing!'
• "You can count on me!"
• 'You can count on me'
• 'O.K., I'm on it!'
• You can count on me if 10 across has party
• ''Glad to''
• ''I'm on it''