The Partnership manages and evaluates its operations in four operating segments, three of which are reportable segments: Propane, Fuel Oil and Refined Fuels and Natural Gas and Electricity. The chief operating decision maker evaluates performance of the operating segments using a number of performance measures, including gross margins and income before interest expense and provision for income taxes (operating profit). Costs excluded from these profit measures are captured in Corporate and include corporate overhead expenses not allocated to the operating segments. Unallocated corporate overhead expenses include all costs of back office support functions that are reported as general and administrative expenses within the consolidated statements of operations. In addition, certain costs associated with field operations support that are reported in operating expenses within the consolidated statements of operations, including purchasing, training and safety, are not allocated to the individual operating segments. Thus, operating profit for each operating segment includes only the costs that are directly attributable to the operations of the individual segment. The accounting policies of the operating segments are otherwise the same as those described in the summary of significant accounting policies in Note 2.

The propane segment is primarily engaged in the retail distribution of propane to residential, commercial, industrial and agricultural customers and, to a lesser extent, wholesale distribution to large industrial end users. In the residential and commercial markets, propane is used primarily for space heating, water heating, cooking and clothes drying. Industrial customers use propane generally as a motor fuel burned in internal combustion engines that power over-the-road vehicles, forklifts and stationary engines, to fire furnaces and as a cutting gas. In the agricultural markets, propane is primarily used for tobacco curing, crop drying, poultry brooding and weed control.

The fuel oil and refined fuels segment is primarily engaged in the retail distribution of fuel oil, diesel, kerosene and gasoline to residential and commercial customers for use primarily as a source of heat in homes and buildings.

The natural gas and electricity segment is engaged in the marketing of natural gas and electricity to residential and commercial customers in the deregulated energy markets of New York and Pennsylvania. Under this operating segment, the Partnership owns the relationship with the end consumer and has agreements with the local distribution companies to deliver the natural gas or electricity from the Partnership’s suppliers to the customer.

Activities in the “all other” category include the Partnership’s service business, which is primarily engaged in the sale, installation and servicing of a wide variety of home comfort equipment, particularly in the areas of heating and ventilation.

The following table presents certain data by reportable segment and provides a reconciliation of total operating segment information to the corresponding consolidated amounts for the periods presented:

	Year Ended
	September 28,			September 29,			September 30,
	2019			2018			2017
Revenues:
Propane	$	1,083,446		$	1,153,323		$	1,011,078
Fuel oil and refined fuels		92,084			91,520			78,126
Natural gas and electricity		45,206			54,308			55,103
All other		46,969			45,262			43,579
Total revenues	$	1,267,705		$	1,344,413		$	1,187,886

Operating income (loss):
Propane	$	254,447		$	248,473		$	218,346
Fuel oil and refined fuels		8,489			7,605			8,552
Natural gas and electricity		8,758			12,309			13,826
All other		(19,516	)		(20,145	)		(23,017	)
Corporate		(101,324	)		(90,239	)		(89,112	)
Total operating income		150,854			158,003			128,595

Reconciliation to net income:
Loss on debt extinguishment		—			—			1,567
Interest expense, net		76,663			77,383			75,263
Other, net		4,702			4,692			13,311
Provision for (benefit from) income taxes		857			(606	)		459
Net income	$	68,632		$	76,534		$	37,995

Depreciation and amortization:
Propane	$	108,763		$	111,460		$	111,374
Fuel oil and refined fuels		2,083			2,574			2,610
Natural gas and electricity		—			—			—
All other		196			215			283
Corporate		9,830			10,973			13,671
Total depreciation and amortization	$	120,872		$	125,222		$	127,938

	As of
	September 28,		September 29,
	2019		2018
Assets:
Propane	$	1,904,344	$	1,995,060
Fuel oil and refined fuels		44,279		47,911
Natural gas and electricity		11,907		13,067
All other		2,950		3,363
Corporate		34,868		41,798
Total assets	$	1,998,348	$	2,101,199