Ie during summer vacation. Materials to be acquired, or should have a normal period and representing 80% of each month during the semester, representing 60% of total production.
That is, during the summer holidays to buy more or should have accounted for 80% of the normal period for a month to stop between school sector accounted for 60% of total production.
In other words, during the summer season. Stop raw materials that will buy up or should be thought to be a 80% of normal period last month and stopped between the sector accounted for about 60% of the total study of production