Company A:
Premium = Rs. 18
We know that if MV > FV, then the share is at premium.
∴ MV = FV + Premium
⇒ MV = 2 + 18 = Rs.20
We know that investment = number of shares × MV
∴ Investment in company A = 200 × 20
= Rs. 4000
Company B:
∴ Investment in company B = 45 × 500
= Rs. 22, 500
Company C:
∴ Investment in company C = 1 × 10, 540
= Rs. 10, 540
Joseph has invested 4000 + 22, 500 + 10, 540 = Rs. 37, 040