27 June 2022

• curprev 20:3720:37, 27 June 2022‎ imported>Doug Williamson‎ 500 bytes +45‎ Classify page.

15 January 2016

• curprev 20:3820:38, 15 January 2016‎ imported>Doug Williamson‎ 455 bytes +2‎ Improve calculation.

21 March 2015

• curprev 12:0512:05, 21 March 2015‎ imported>Doug Williamson‎ 453 bytes −2‎ Standardise appearance of page

15 March 2015

• curprev 13:1413:14, 15 March 2015‎ imported>Doug Williamson‎ 455 bytes +22‎ Standardise appearance of page.

14 March 2015

• curprev 15:2915:29, 14 March 2015‎ imported>Doug Williamson‎ 433 bytes +6‎ Align presentation of formula with qualification material

20 September 2014

• curprev 15:1215:12, 20 September 2014‎ imported>Doug Williamson‎ m 427 bytes +9‎ Added more space so that calculations are clearer

4 August 2013

• curprev 22:0722:07, 4 August 2013‎ imported>Doug Williamson‎ m 418 bytes −2‎ Spacing

23 October 2012

• curprev 14:1914:19, 23 October 2012‎ imported>Administrator‎ 420 bytes +420‎ CSV import