Answer:
Cost of retained earnings = 0.13 
Step-by-step explanation:
given data 
(D1) = $1.80
current price = $36 
growth rate = 9 percent 
solution
we get here Cost of retained earnings (Ke) that is express as
Cost of retained earnings = ( D1 ÷ P ) + g ................1
here P is price and g is growth rate 
put here value and we get 
Cost of retained earnings = (1.80 ÷ 36 ) + 0.08 
Cost of retained earnings = 0.13