The only time you'll make money is if you sell all those calves (unless you're being paid by the owner of the calves to raise them). Then the prices will depend on the sex, breed, and weight of the calves.
Currently you get about $40 for a gram, so that'd make $1600
40 million us $ anually
$83,200. Assuming you work 40 hours a week, for 52 weeks, that amounts to 2,080 hours in a year. $40 x 2,080=$83,200
$20,800
$4
80.
I would make 10 pounds for 40
40
$30-$40 an hour
keep raising its level
Currently you get about $40 for a gram, so that'd make $1600
40 million
About 40 to 50 a year
450,000
$40/hour
$40/hr
about £20 for 40