 
 <translate> First, the 144 acres of grass will be eaten according to the equation 5 * 2 * T + 8 * 1 * T = 144. Solving this equation for T, we find 18 * T = 144, or T = 8 months of food are covered by the animals grazing on the rancher's pasture. This means the farmer must buy feed corn for the remaining 12 - 8 = 4 months. Next, the rancher's 8 sheep will require 4 / 2 = 2 bags of feed corn each, or 8 * 2 = 16 bags of feed corn in total for the 4 month period. The rancher's 5 cows will require 4 / 1 = 4 bags of feed corn each, or 5 * 4 = 20 bags of feed corn in total for the month. Therefore, the rancher needs 16 + 20 = 36 bags of feed corn for all of his animals. So, the rancher will need to spend 36 * 10 = $360 per year on feed corn. The answer: 360. <ibo> Nke mbụ, a ga-eri ahịhịa ahụ dị otu narị hekta na iri anọ na anọ n'ụzọ kwekọrọ n'ihe e kwuru na 5 * 2 * T + 8 * 1 * T = 144. Ọ bụrụ na anyị achọpụta otú T si bụrụ T, anyị ga-achọpụta na 18 * T = 144, ma ọ bụ T = ọnwa asatọ nke nri ụmụ anụmanụ ndị na-ata nri n'ebe anụ na-ata nri na-eri. Nke a pụtara na onye ọrụ ugbo ahụ ga-azụrịrị ọka e ji eme nri maka ọnwa 12 fọdụrụnụ - 8 = ọnwa 4. Mgbe nke ahụ gasịrị, atụrụ 8 nke onye ọrụ ugbo ahụ ga-achọ 4 / 2 = akpa ọka nri 2 nke ọ bụla, ma ọ bụ 8 * 2 = ngụkọta nke akpa ọka nri 16 maka oge ọnwa 4 ahụ. Nne ehi ise nke onye ọrụ ugbo ahụ ga-achọ akpa nri ọka 4 / 1 = akpa nri ọka 4 nke ọ bụla, ma ọ bụ 5 * 4 = akpa nri ọka ọka 20 n'ozuzu ya maka ọnwa ahụ. Ya mere, onye ọrụ ugbo ahụ chọrọ akpa ọka 16 + 20 = 36 maka anụmanụ ya nile. Ya mere, onye ọrụ ugbo ahụ ga-emefu 36 * 10 = $360 kwa afọ n'ịzụ ọka. Azịza ya bụ: 360. 