Please help

Jolene Gratton is an accountant with a large multinational firm of accountants. She earns $120,000 annually. Her firm, Alfred Alfredson, has recently been under intense media and regulatory scrutiny. Jolene finds that many corporate returns she has completed over the last five years will be audited and she will be required to provide input and rationale. Under this pressure, Jolene cannot sleep and becomes so depressed she is unable to work. Her doctor diagnoses Jolene with a maniac-depressive state requiring lengthy rest and large doses of antidepressants, which qualifies Jolene for full disability with a 31-day waiting period and a 65% benefit. After six months, Jolene finds out that many of the cases she dreaded have been taken over by her colleagues and she could resume new corporate work. She agrees to return to work for 40% of the time, initially. How much extra will Jolene earn from the residual benefit than if she continued on disability income benefits alone?