Figure 20.2.14-12 Overlapping Period Time LineSummary: The following display shows a time line for the Stetson Corporation example concerning the overpayment and underpayment interest accrual. This time line is presented using numbers from left to right to explain the data on the page. This data is displayed from where the time span begins to where the span ends (by numbers) and then what information is presented. Amounts enclosed in parentheses represent a credit amount.200512, Form 1120, Overpayment, 03152006, ($9,200.00)200612, Form 1120, Underpayment, 03152007, $27,000.00200512, Refund, 08092008, $10,737.99200612, 870 waiver date plus 30 days, 12212008From 1 to 2: Overpayment available ($9,838.13) which consists of ($9,200.00) principal and ($638.13) overpayment interest as of 03152007.From 2 to 3: Overlapping Period: Underpayment interest computed at the overpayment interest rate $899.86 (03152007 to 08092008 on netted amount of $9,838.16).From 2 to 4: Underpayment interest computed at the normal rate $2,228.81 (03152007 to 12212008 - interest on the $17,161.87 amount of underpayment that is not netted ($27,000.00 less $9,838.13).From 3 to 4: Underpayment interest at normal rate $222.89