June 2013 Q1(a) NPV

Hello, whatever questions i did thus far had their working capital returned at the last year regardless of whether it was stated or not, unless ofcourse it was stated that working capital will not be recovered and should not be bothered with.

However in this June 2013 question, the examiner has not recovered the working capital in year 4, rather he just let it inflate while there is no statement anywhere in the question that working capital won’t be recovered?

Unless ofcourse if by machinery being replaced he meant working capital won’t be recovered?

Please clarify, thanks