I bought a load of LSG less than 12 months ago, and recently...

I bought a load of LSG less than 12 months ago, and recently sold it in its new guise as LST

There is a PDF in the announcements for LST that says the tax base for converted LST shares is $2.20

what does that mean exactly?

i.e. lets say I bought 1 LSG for $1.70

it converts to LST

I sell the LST share for $1.80

Have I made 10 cents? or due to this 'tax base' thing, have I somehow lost 40 cents for tax purposes?

confused......