A company produces 50 metal cylinders within 2 hours with the use of 2 workers. 100 kg of metal are used in this process. The metal costs 5 EUR / kg when purchasing. Each employee incurs labor costs of EUR 50 for one hour of work. The final product can be sold at a unit price of EUR 20 / piece. Calculate employee productivity (production output per employee hour) and the profitability of production (sales revenue in relation to production costs). How do both sizes change when labor costs rise by 10%?