Cheapest test to measure total/free testosterone, oestradiol and SHBG in UK

Hi, so this is the cheapest test I have found to measure total/free testosterone, oestradiol and SHBG in the UK.
One thing I did notice is that the Free testosterone results has a (calculated) after it. Is this normal or a half arsed result?

https://www.medichecks.com/hormone-t...ini-check-male

They're just using a formula and calculate it using your total test, shbg and albumin most likely. You can find these calculators on line as well.