Answer:
correct answer is option B
Step-by-step explanation:
rice corporation cost formula for maintenance :
Y = $4800 + $0.40 X
where, Â X is machine hours
So,
in august budget hours given is = 9000.
Now, substituting  the value of hours in the given formula,
we get,
Y = $4800 + $0.40*(9000)
Y = $4800 + $3600
Y = $8400
hence, the maintenance incurred during August month is $8400
So, Â the correct answer is option B