[Solved] What is the difference between a naked call option and a covered call option? Which one is riskier and why? Average Payments: The mean amount paid over a defined period payments. Average Daily Float: The average amount of uncollected funds represented in checks or other negotiable instruments over a specified period. Lockbox System: A service provided by banks to accelerate collection of payments by having those payments sent to a special post office box rather than to the company. Treasury Bills: Represent short-term government securities issued at a discount from the par value and mature without interest payments.