A company wants to develop a level production plan for a family of products. The opening inventory is 100 units, and then increase to 180 units is expected by the end of the plan the demand for each of the next 6 periods is: 100, 120, 125, 130, 115 and 110. Assume that all periods at the same number of working days. Based on this data, the total forecasted demand over the next 6 periods is: Group of answer choices 780 units 130 units 140 units 700 units None of the above