The correct answer is A (€14.05) because the harmonic mean is the appropriate measure to calculate the average price per share when employing cost averaging. The harmonic mean accounts for the fixed investment amount and variable share prices, yielding an average cost of €14.05.

• Option B (€14.33) is incorrect as it uses the arithmetic mean, which assumes equal weighting of share prices. This method is unsuitable for fixed investment amounts with variable share prices.
• Option C (€14.63) is incorrect because it misapplies the weighted mean formula by using share prices as weights, which is not appropriate for this scenario.