Note: For FULL credit, show your computation in details $($with clear labels of important numbers$)!$ In all cases, round to $2$ decimal places if needed. $23.$ Kolaser Company applies overhead on the basis of machine hours. For April, Kolaser's estimated overhead was $\backslash (\backslash$$ $6,000\backslash )$ with an estimated activity level of $1,200$ machine hours. Actual overhead amounted to $\backslash (\backslash$$ $7,000\backslash )$ with actual machine hours totaling $1,300.$ On April $30,$ Kolaser found the overhead variance to be "material". The following balances appeared in the accounts of Kolaser before closing any temporary account $($Since there was no detailed information available on the amount of overhead contained in each account, Kolaser decided to use the current balance of relevant accounts for its disposal of overhead variance if needed$)$: $(1)$ Determine the amount of overhead variance during the month of April $($Show your detailed computational work; otherwise no credit!$)$ and whether it was an overapplied or an underapplied variance; $(2)$ prepare a journal entry to close the overhead variance found in $(1).[15$ POINTS$]$