The entire Test & Trace costed about 37 billion (at the latest estimate) and ministers admitted it has only a marginal impact on limiting spread:
https://blogs.bmj.com/bmj/2021/03/19/covid-19-test-and-trace...
https://blogs.bmj.com/bmj/2021/03/19/covid-19-test-and-trace...
Why add in 36.9 billion of other costs? (other than to distort it to make it look much more expensive than it is?)