1 7 . Segment Information 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 condensed consolidated statements of operations. In addition, certain costs associated with field operations support that are reported in operating expenses within the condensed 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 Note 2, Summary of Significant Accounting Policies, in the Partnerships Annual Report on Form 10-K for the fiscal year ended September 29, 2018. 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 Partnerships suppliers to the customer. Activities in the all other category include the Partnerships 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: Three Months Ended Six Months Ended March 30, March 31, March 30, March 31, 2019 2018 2019 2018 Revenues: Propane $ 433,056 $ 462,814 $ 754,416 $ 784,944 Fuel oil and refined fuels 41,598 41,699 70,507 67,014 Natural gas and electricity 17,596 20,392 31,000 33,539 All other 12,127 11,377 25,558 24,062 Total revenues $ 504,377 $ 536,282 $ 881,481 $ 909,559 Operating income: Propane $ 162,650 $ 144,395 $ 233,121 $ 220,118 Fuel oil and refined fuels 8,071 7,199 11,541 11,023 Natural gas and electricity 4,885 5,454 7,713 8,939 All other (4,152 ) (4,981 ) (8,796 ) (10,214 ) Corporate (29,364 ) (24,663 ) (52,955 ) (45,542 ) Total operating income 142,090 127,404 190,624 184,324 Reconciliation to net income: Interest expense, net 19,647 19,402 39,135 38,916 Other, net 1,175 1,174 2,351 2,346 Provision for (benefit from) income taxes 252 41 403 (893 ) Net income $ 121,016 $ 106,787 $ 148,735 $ 143,955 Depreciation and amortization: Propane $ 27,939 $ 28,288 $ 54,894 $ 56,069 Fuel oil and refined fuels 503 716 1,025 1,295 Natural gas and electricity     All other 48 56 100 106 Corporate 2,133 3,143 4,675 5,864 Total depreciation and amortization $ 30,623 $ 32,203 $ 60,694 $ 63,334 As of March 30, September 29 , 2019 2018 Assets: Propane $ 2,020,044 $ 1,995,060 Fuel oil and refined fuels 55,396 47,911 Natural gas and electricity 15,277 13,067 All other 3,649 3,363 Corporate 45,604 41,798 Total assets $ 2,139,970 $ 2,101,199