I keep getting this wrong, please help

Consumers' Surplus The demand function for a certain make of replacement cartridges for a water purifier is given by the following equation where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. p=0.01x20.2x+43 Determine the consumers' surplus if the market price is set at $8/ cartridge. (Round your answer to two decimal places.) $ TANAPCALCBR10 6.7.002.MI. Consumers' Surplus The demand function for a certain brand of CD is given by p=0.01x20.1x+27 where p is the wholesale unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. Determine the consumers' surplus (in dollars) if the market price is set at $7/disc. (Round your answer to two decimal places.)