CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Sales:
Total sales		$ 373,320	$ 508,945
Cost and expenses:
(Increase) decrease in the fair value of derivative instruments	[1]	(17,395)	(6,417)
Delivery and branch expenses		80,687	96,726
Depreciation and amortization expenses		7,957	9,050
General and administrative expenses		6,241	6,506
Finance charge income		(406)	(713)
Operating income		54,786	42,451
Interest expense, net		(1,851)	(2,679)
Amortization of debt issuance costs		(247)	(235)
Income before income taxes		52,688	39,537
Income tax expense		14,828	11,782
Net income		37,860	27,755
General Partner’s interest in net income		296	192
Limited Partners’ interest in net income		$ 37,564	$ 27,563
Basic and diluted income per Limited Partner Unit:	[2]	$ 0.74	$ 0.49
Weighted average number of Limited Partner units outstanding:
Basic and Diluted		42,246	47,266
Product
Sales:
Total sales		$ 300,332	$ 432,688
Installations and services
Sales:
Total sales		72,988	76,257
Cost of product
Cost and expenses:
Cost and expenses		172,147	287,673
Cost of installations and services
Cost and expenses:
Cost and expenses		$ 69,303	$ 73,669

[1] Represents the change in value of unrealized open positions and expired options.

[2] See Note 16 - Earnings Per Limited Partner Unit.