A = -599 if I read the question correctly
Answer:
Markup amount = sellingprice - costprice
=12.50 - 5 = 7.5 is markup
Hours = 34
Income per hour = 12.5$
Service calls = 6
Income per call = 4
Therefore, total income
= (time of working * income per hour) + (service calls * income per call) = (34*12.5) + (6*4)
= 425+24
= 449
