Expenses & Operating Income

Operating Expenses	2018	2017
Salaries and Fringe	581,060,963	546,418,454
Supplies and other	288,668,517	244,540,865
Purchased services	401,537,590	334,994,101
Depreciation and amortization	52,443,010	47,166,919
Provision for non-patient bad debts	37,488	8,178
Interest Expense	16,116,314	11,394,617
Operating income (loss)	38,423,854	43,307,681
Total expenses	1,339,863,883	1,184,523,133

Nonoperating income (loss)	2018	2017
Income from investments	22,552,321	32,450,567
Other	(1,042,949)	(2,230,584)
	21,509,373	30,219,983
Operating margin (%)	2.79%	3.53%
Excess (deficiency) of revenues over expense	59,933,227	73,527,664