For the year ending June 30, OKeefe Medical Services Co. mistakenly omitted adjusting entries for (1) $6,700 of supplies that were used, (2) unearned revenue of $11,900 that was earned, and (3) insurance of $3,300 that expired. Indicate the combined effect of the errors on (a) revenues, (b) expenses, and (c) net income for the year ended June 30.