Answer:
a. $140,000 decrease
Explanation:
[tex]\left[\begin{array}{cccc}Year&continued&discontinued&differential\\Sales&680,000&0&-680,000\\variable \: cost&-540,000&0&540,000\\contibution&140,000&0&-140,000\\fixed \: cost&-145,000&-145,000&0\\net \: income&-5,000&-145,000&-140,000\\\end{array}\right][/tex]
The fixed cost would not be eliminated entirely and we have no information of any partial decrease. so the differential analysis shows a decrease in 140,000 in the net income if product T is discountinued