EXHIBIT D-COMPUTATION OF POSTAGE BASED ON MAILINGS OF ONE ISSUE OF A QUALIFYING CLASSROOM PUBLICATION ISSUED WEEKLY POST OFFICE DEPARTMENT STATEMENT SHOWING NUMBER OF COPIES OF SECOND-CLASS OR CONTROLLED CIRCULATION PUBLICATION MAILED 13. When postage is computed at the key rate, the lines for Zones 1 to 8 need not be completed except for one issue each calendar year at 12-month intervals. The total zone mailings must be entered in item 14 during the 12-month intervals. |