Chapter 7-Exam preparation question –

Dear Sir good afternoon
I have two questions concerning the depreciation that is calculated for the Office buildings (p.137 at solutions)

1) On the workings for the calculation for the CV on 31/12/20×8 the depn is 500. (rem.UL 14y)
But at the calculation for the retained earnings the depreciation is 700 (here it takes into account the new UL 10Y). Why in retained earning we don’t include the depn 500 and we use the 700?

2) Also why we don’t include also to OCI (16875-14000=2.875) the decrease in depn 625-500= 125 on 31/12/x8? And so the balance to be -2875 + 125= 2750?
And therefore the amount that will be transferred to Retained Earnings to be 2750

Thank you
Evaggelia