Sexual health postal testing kits

I would like to know:
(1) the amount spent in pounds sterling on sexual health postal testing kits (which are sent through the post to a person’s home and then returned by them for analysis) in the past three financial years: 2018-19; 2017-18; 2016-17 ‘ up to the latest year for which data is held.

Year 2016/17: £78.774.13

Year 2017/18: £81.170.50

Year 2018/19: £40.727.91 (the contract has been relocated from 1 July 2018)

(2) the number of sexual health postal testing kits sent to persons in the past three years (figures for each year)

Year 2016/17: 3787

Year 2017/18: 4056

Year 2018/19: 965 (contract relocated from 1 July 2018)

(3) the number of sexual health postal testing kits returned to the authority in the same years (figures for each year)

Devon County Council does not hold this information