Tesco chocolate fudge cake - help

We have about a quater of one of these in the fridge and I'm planning to share this with my hubby.... depending on the syns !!!

Per 100g its: 380kcal, 20.4g fat, 42.8g carb, 5.5g protein
Would anyone know how many syns that is ? I'll work out how much I'll have depending on how much it is per 100g !

Thanks in advance x

Panic over I managed to find it 19 syns per 100g. Thats quite alot