What is the average U.S. price charged for removing "sludge" from an engine?

What is your question?

15 Mar 2012 I took 2004 Echo 4dr Autotrans to dealer for scheduled maintenance. They told me the engine had "sludge" in it & it must be removed or engine replacement would soon result! The radiator, which was leaking, was also replaced(16400-21070)$576.31, 771 CP 1.50 $129.00, Sludge remove 771 CP 7.00 712.00, Cyl Hea Gasket (11213-21011) $23.36, +misc $ Total=$1584.39 Note: previous maintenance 12 Sept 2011