 
 <prompt> Roe nwere ike iji $10 na ncha site na n'agba nke Janụari na Julaị na nwere ike iji $15 na ncha site na n'agba nke Agụstụ na Novemba. Kedu ihe o nwere ike iji iji na Disemba ka o nwere ike iji n'ime ihe n'ime n'ọdịdị n'afọ? <response>: ```N'ihi na e nwere 7 onwa site na January na July, otu Roe's savings maka ndi onwa a na-eme na $10 x 7 = $70.
N'ihi na e nwere 4 onwa site na August na November, otu ihe savings ya maka ndi onwa a na-eme na $15 x 4 = $60.
Ihe savings ya maka January na November bụ $70 + $60 = $130.
N'ile, o nweghị ike iji $150 - $130 = $20 na December.

Ọ bụghị ihe ọ bụla bụ 20.``` 