The Cold War threatened the independence of new nations. Since the Soviet Union and the United States were competing for political influence, many newly independent nations were subject to take over either by the Soviet Union or the USA. However, there was also a positive impact to some newly independent countries because the two antagonists of the Cold War would support whatever country they saw fit. Therefore, some new countries gained support from larger nations.
This is just one of the many possible answers, since so many nations were affected differently. All the same, I hope this helps. :)
The most logical combination would be to decrease the production of balls, and increase the production of nets, in order to achieve a market equilibrium that allows both products to be sold. For this it would be necessary to allocate more money to the production of nets, and to diminsh the cost referred to balls, until arriving at half of expense for each one.