Clarification to problem 1 in project assignment AB

The unit for the costs for grid reinforcements is not stated correctly in the problem text. The values reported in table 2 show the annual cost for building transmission lines capable of transferring 1 TWh/year. Consequently, building a new transmission capability of 1 TWh/year between North and South would cost 10 M¤/year, 2 TWh/year would cost 20 M¤/year, etc.