Insomniacs incorporated reported the following information:

Predetermined overhead application rate: $$8\mathrm{.}30$ per machine hour

Actual overhead rate: $$8\mathrm{.}50$ per machine hour

Estimated machine hours: $30,000$

Actual machine hours: $32,000$

a$.$ If Insomniacs Incorporated does not use an adjusting entry to correct manufacturing overhead, what will be the effect on net income $($assuming no beginning or ending inventory balances$)?$

b$.$ By how much? Note: Enter as a positive value.