I'm sorry but I don't think the whole thing is 7.5 :cry:
Its one of those silly nutritional value panels thats in ML whilst the weight on tin is in G. A 25ml portion is 0.5 syns and there are 40 portions in a can so the whole can is 20 syns. Although the can lasts ages so I still have a bloody good squirt when I use it and usually count up to 2 syns to be safe.