Hi Can anyone please help me with this question

I was looking at the answer for Question 2 in May 2009 P9, and i am a bit confused as to how the answer was arrived at for the actual return to the shareholders

This was the equation 

( Share price for latest year - share price for previous year + Dt ( i assume this is Debt x Corp Tax rate) / share price for previous year

if you look at the answers provided, what i do not understand is where the figure for the Dt came from, the 19.2?

i understand the other figures, but i cannot figure out how the Dt figure came up

can someone please help??

I would greatly appreciate it

Thanks!