What was the total cost of the post-budget vote ministerial engagements and programmes held on (a) 5 to 8 June 2013 in Khayelitsha and (b) 8 to 11 May in Gugulethu, including the amounts spent on (i) transport, (ii) catering, (iii) accommodation, (iv) equipment, (v) advertising and (vi) other related expenses?