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<br />r <br /> <br />D. Average Purchase Prices-Base Case and Actual <br /> <br />The average monthly purchase price estimates are derived from the <br />actual nonfirm energy purchase prices. With the help of the Power <br />Control staff (Montrose), some of the higher purchase prices for all <br />months that are associated directly with interim release <br />constraints, were excluded. As an example, June shows a $1.66jMWh <br />difference from the Base Case offpeak and Actual offpeak prices. In <br />consultation with Montrose, it was necessary to omit two high <br />offpeak purchases that did not reflect the nonfirm energy market in <br />June. An adjusted weighted average of remaining purchase amounts <br />and prices are rendered to calculate the base case offpeak and <br />onpeak purchase prices. <br /> <br />.,1 <br /> <br />.. <br />" <br /> <br />'. <br /> <br />Average Base Case monthly purchase prices are estimated as follows: <br /> <br /> ENERGY PURCHASE PRICES <br /> Base Case Actual <br /> Months Offpeak Onpeak Offpeak On peak <br />Apri 1 1994 $I6,35jMWh $23.78jMWh $I6.36jMWh $23.78jMWh <br />May 1994 16.36jMWh 23.71jMWh 16.36jMWh 23. 7I jMWh <br />June 1994 14.94jMWh 23.55jMWh I6.60jMWh 23.70jMWh <br />July 1994 16.08jMWh 23.56jMWh 16.08jMWh 23,56jMWh <br />August 1994 I6.47jMWh 24.65jMWh I6.51jMWh 24.83jMWh <br />September 1994 15.55jMWh 24.04jMWh 15.55jMWh 24.07jMWh <br /> <br />:} <br /> <br />-. <br />i.~ <br /> <br />E. Economy Energy Sales Prices--Base Case and Actual <br /> <br />The sales price for the Base Case is determined with the help of <br />tne Montrose Power Control Staff (Montrose). Ine estimate of <br />economy energy sales prices involve three steps: <br /> <br />1. Identification of the range of market prices through review of <br />Montrose District Office Power Control staff's summaries of <br />then-current weekly market prices, as reflected in Western's <br />Weekly Reports to the Secretary. <br /> <br />2. Review of the actual monthly economy energy sales summary and, <br />with the help of the Power Control staff, identification of <br />those forced sales directly associated with interim release- <br />constraints. <br /> <br />.~; <br />"i <br /> <br />'.;:. <br /> <br />-',- <br />" <br /> <br />~ <br />~f <br />t.J <br />~-t: ; <br />~~~. <br /> <br />'.' <br /> <br />3. Assumption of expected sales price based on then-current <br />marKet conditions for tnat portion of sales identified in <br />step 2. <br /> <br />7 <br />