Wow! 57 syns!
There is a feature on the website about Subway:
6-inch
Wheat or Italian - 9 Syns
Italian cheese and herbs, hearty Italian, honey oat and wraps - between 10-12 Syns
Sweet onion, honey mustard, hot chilli and BBQ sauce - 1-2 Syns
Light mayonnaise, Chipotle Southwest sauce and ranch dressing - 3-5 Syns
Still reasonable with free cooked meats and plenty of free salad though!
Samus x