A ceramic pottery unit hires 8 craftsmen by paying each of them Rs 900 per day. The 9th craftsman demands Rs 950 per day. If this craftsman is hired then all other craftsmen must be paid Rs 950. The marginal resource (labour) cost of the 9th craftsman is _________.
In the following figure, rectangle represents brand managers, circle represents cartoonist, triangle represents sculptors and square represents fathers. Which set of letters represents fathers who are either brand managers or cartoonists?