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Shanker purchases 20 shirts for \(₹\)151 and Sheela purchases 12 shirts for \(₹\)275. Calculate who bought the shirt costlier and also find out how much amount they both spent on buying one shirt.
 
Shanker purchases one shirt for an amount of \(₹\).
 
Sheela purchases one shirt for an amount of \(₹\).
 
bought the shirt Costlier.
[Note: Submit the answer as a whole number].