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-- Sample test data

type Sales = (String, String, Int)


testData :: [Sales]

testData :: [("Me and My Broken Heart","Rixton"),("It’s My Birthday","will.i.am"),("Problem","Ariana Grande")]


-- record a sale of a track 

sellTrack :: String String-> [Sales]

sellTrack :: trackName artistName = [Sales] ++ [(trackName, artistName, numberSold)]

I get the error "illegal literal in type : "Me and my broken

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You need to use = in the definition:

testData :: [Sales]

testData = [("Me and My Broken Heart","Rixton",5),("It’s My Birthday","will.i.am",4),("Problem","Ariana Grande",3)]
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