 
<translate> Tambaya: Marky ya mallaki shagon kayan kwalliyar kwamfuta. A wannan watan, rabin tallace-tallace nasu na wayoyin mara waya ne, kashi ɗaya cikin huɗu na wayoyin gani ne, sauran kuma na ƙwallon ƙafa ne. Idan shagon Marky ya iya sayar da jimillar mice 80, nawa ne daga cikinsu su ne mice na trackball? Ka yi tunani sosai da farko, sannan ka yanke shawara: <eng> Question: Marky owns a computer accessory shop. For this month, half of their sales are wireless mice, one-fourth are optical mice, and the rest are trackball mice. If Marky's shop was able to sell a total of 80 mice, how many of them are trackball mice? Think carefully first, then make a decision: 