First find the total increase in Bob's earnings: $0.50/hour * 40 hours/week = $<<0.50*40=20>>20/week
Then find the weekly decrease in Bob's housing assistance: $60/month / 4 weeks/month = $<<60/4=15>>15/week
Then subtract the lost assistance from the increased wages to find Bob's net increase in money: $20/week - $15/week = $<<20-15=5>>5/week
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