The forecast reserves are 1,700, but this includes the forecast profit of 350. Under proposal 1, the forecast profit is only 309.56 (see appendix 3). They will fall by 1,200 due to the buying back of shares (see the note in the answer under proposal 1).
So the forecast reserves will be 1,700 – 350 + 309.56 – 1,200 = 459.56.