Bug: Wrong value "Average cost" that distorts the result

[sebfar9172]

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Bug description

I bought the same shares over different periods and the average cost is not well calculated

To Reproduce

1. Bought 1.9887 shares of 49V at €88,63
2. Bought 0.388 shares of 49V at €58,64
3. Calculation made by the application: €73,64

Expected behavior

1.9887 * €88,63 = 176,26 €
0.388 * €58,64 = 22,75 €

Average cost = (176,26 + 22,75) / (1,9887+0,388) = 83,734 (and not 73,64)

Screenshots and/or recordings