 
<translate> Otu nkuzi na-ewe awa 1.5, yabụ awa 18 n'ime ha bụ 18 / 1.5 = nkuzi 12. Ọ bụrụ na otu nkuzi na-efu $30, mgbe ahụ nkuzi 12 na-efu 12 * 30 = $360. Azịza ikpeazụ ya bụ: 360. <eng> One lesson lasts 1.5 hours, so 18 hours of them is 18 / 1.5 = 12 lessons. If one lesson costs $30, then 12 lessons cost 12 * 30 = $360.
The final answer: 360. 