Syn value in tesco white chocolate buttons

Am I right in thinking 1syn per 20syns for chocolate buttons have a big bag so can work out if I weigh them in a bowl. Trying to work to have buttons or stick to Milky Way. Thanks x

Yes that's right - 1 syn per 20 calories. According to their website, there are 550 calories per 100g, so that would be 27.5 syns. So that would be 2.75 syns per 10g.