19 April 2015

• curprev 18:4218:42, 19 April 2015‎ imported>Doug Williamson‎ 539 bytes +1‎ Clarify.

21 March 2015

• curprev 12:2212:22, 21 March 2015‎ imported>Doug Williamson‎ 538 bytes −1‎ Standardise appearance of page

15 March 2015

• curprev 13:1213:12, 15 March 2015‎ imported>Doug Williamson‎ 539 bytes −2‎ Standardise appearance of page.

14 March 2015

• curprev 15:3015:30, 14 March 2015‎ imported>Doug Williamson‎ 541 bytes +8‎ Align presentation of formula with qualification material

20 September 2014

• curprev 15:1315:13, 20 September 2014‎ imported>Doug Williamson‎ m 533 bytes +2‎ Added more space so that calculations are clearer

9 October 2013

• curprev 14:0014:00, 9 October 2013‎ imported>Doug Williamson‎ m 531 bytes +31‎ Category added 9/10/13 and spacing

23 October 2012

• curprev 14:1914:19, 23 October 2012‎ imported>Administrator‎ 500 bytes +500‎ CSV import