 
<translate> Ọkara nchịkọta Bernie pụtara 18 * 0.5 = 9 postkaadị. Ya mere, o rere akwụkwọ ozi 9 maka 9 * 15 = $135. O kpebiri imefu ego ya nile n'ịzụta kaadị ọhụrụ e ji ezi ozi maka $5 nke ọ bụla, n'ihi ya, o nwere ike ịzụta kaadị ọhụrụ 135 / 5 = 27. Nke a pụtara na Bernie nwere 9 + 27 = kaadi mpempe akwụkwọ 36. Ya mere azịza ya bụ 36. <eng> Half of Bernie's collection means 18 * 0.5 = 9 postcards. So he was able to sell 9 postcards for 9 * 15 = $135. He decided to spend all of his money on new postcards for $5 each, so he was able to buy 135 / 5 = 27 new postcards. This means Bernie has 9 + 27 = 36 postcards after all. So the answer is 36. 