Significant transactions with related parties were:



	Millions of Dollars
	Three Months Ended June 30			Six Months Ended June 30
	2016		2015	2016	2015

Operating revenues and other income (a)	$	549	674	956	1,291
Purchases (b)	2,148		2,406	3,651	4,354
Operating expenses and selling, general and administrative expenses (c)	28		31	61	62
Interest expense (d)	2		1	3	3

(a)

We sold NGL and other petrochemical feedstocks, along with solvents, to CPChem, and we sold gas oil and hydrogen feedstocks to Excel Paralubes. We sold certain feedstocks and intermediate products to WRB and also acted as agent for WRB in supplying crude oil and other feedstocks for a fee. We also sold refined products to our OnCue Holdings, LLC joint venture. In addition, we charged several of our affiliates, including CPChem, for the use of common facilities, such as steam generators, waste and water treaters, and warehouse facilities.

(b)

We purchased crude oil and refined products from WRB. We also acted as agent for WRB in distributing asphalt and solvents. We purchased natural gas and NGL from DCP Midstream, LLC (DCP Midstream) and CPChem, as well as other feedstocks from various affiliates, for use in our refinery and fractionation processes. We paid NGL fractionation fees to CPChem. We also paid fees to various pipeline equity companies for transporting finished refined products and NGL. We purchased base oils and fuel products from Excel for use in our refining and specialty businesses.


(c)	We paid utility and processing fees to various affiliates.


(d)	We incurred interest expense on a note payable to MSLP.