what is the level aggregate plan and what is the chase aggregate plan ?

Manager of Plum Engines must develop an aggregate plan given the forecast for engine demand shown in the table below. The department has a regular output capacity of 150 engines per period, and the overtime capacity is 25 engines per period. Regular output has a cost of $30 per engine. Overtime has a cost of $50 per engine. Subcontracting has a cost of $75 per engine: Inventory holding and backorder costs are $3 and $35 per unit per period, respectively. The beginning inventory is zero engines. 1. Create a level aggregate plan and calculate total costs for the eight-period time horizon. You may plan overtime production and subcontracting as necessary. 2. Create a chase aggregate plan and calculate total costs for the eight-period time horizon. You may plan overtime production and subcontracting as necessary. Level Strategy: Chase Strateov