Required Record the events occurring on May 1 and May 31 in a horizontal statements model. In the Cash Flow column, indicate whether the Item is an operating activity (OA), investing activity (IA), or financing activity (FA). If an element was not affected by the event, leave the cell blank. (Enter any decreases to account balances with a minus sign.) Required Record the events occurring on May 1 and May 31 in a horizontal statements model. In the Cash Flow column, indicate whether the Item is an operating activity (OA), investing activity (IA), or financing activity (FA). If an element was not affected by the event, leave the cell blank. (Enter any decreases to account balances with a minus sign.)