seriously, I try one last time , nobody answer my questions ( five time the same exercice on which I just need help), I even have posted a question to ask why nobody helps, someone comments asking for the exercice, I add it to this last post, and then silence again. moreover I can't respond to comments...

Company X wishes to establish the Aggregate Production Plan for next year, according to the following information: MONTHS Jan. Feb. Mar. Apr. May Jun Jul Aug Sep Oct Nov Dec. Accumulated SALES FORECAST 15.000 15.000 10.000 5.000 5.000 5.000 10.000 5.000 5.000 10.000 15.000 20.000 120.000 PRODUCTION 2020 DAYS 2220 22 21 20 22 2021 20 250 We know the following information: 1. The company manufactures a single product line 2. For each unit of production, 1,5 man-hours of production are needed 3. Each worker's shift last 8 hours. There are three shifts. Maximum number of workers per shift is 50. 4. As of 1st of January, the company is staffed by 150 people (50 fixed employees and 100 eventual ones) Company's costs are as follows: Standard man-hour: 1.0 (ONE ) euro Overtime man-hour: 1.5 euro idle time man-hour: 1.0 euro Contracting cost: 100.0 euro per worker Laying off of an eventual employee cost: 150.0 euro per worker Subcontracting of a production unit: 2.5 euro Stock cost: 0.20 euro /unit x month (average stock of month) Stock breakage cost: 1.5 euro/unit x month (position at the end of the month) Following restrictions also apply, stemming from the company's policies: There are three shifts per day, each one with a maximum of 50 workers. Maximum overtime hours as per union's agreement of 10% of regular hours. Fixed employees cannot be laid off. Demand and costs can be assumed to be lineal According to this info, please ascertain which production strategy is best in class: a.- Chase strategy: Production adjusted to the monthly product needs. Overtime and subcontrating are not permitted. People can be laid off and contracted. Manpower can remain idle, and delays in deliveries are permitted. b.- Level strategy: Manpower headcount constant along the year. Overtime, subcontracting, layoffs and new contracts are forbidden (excepted for the first month). Version 1: without initial stock (some months the stock at month end will be negative) Version 2: with an initial stock (what was left after previous year work), that prevents stock breakage in any month