In answer to the first part of your question, the department is unable to provide spend on focus groups. The data is not held centrally, and to attempt to collect the information would engage the disproportionate costs threshold.
As to the second part of your question, I can confirm that the total spend on surveys by the department in 2013, and up to 31 October 2014 is as follows:
Financial Year April 13-March 14
Financial Year April 14-March 15
This compares to £25,203.50 in 2008/09.