Total number of shares applied for = 2,50,000.
Total shares allotted = 50,000.
Excess applications = 2,50,000 - 50,000 = 2,00,000.
Amount received per share = \rupee10 (face value) + \rupee3 (premium) = \rupee13.
Amount refunded = Excess shares × Amount per share = 2,00,000 × \rupee13 = \rupee32,50,000.