How many calories do I burn eating 2 trays of ice ?

I know 2 trays of ice is a lot but I'm not doing it to lose weight actually I've been eating ice ever since I was little because my mom did it and like passed it on to me and now whenever I'm bored or feel like eating ice I just fill up a mug with ice and eat it and it usually comes to about 2 trays a day and I know it's probably bad for me but I don't care I love eating ice. Anyways today I just found out that you can burn calories eating ice !! Something about your body having to warm itself up. Anyways it's winter where I am and I eat 2 trays of ice almost every day so how many calories am I burning by doing this ?? I know it spends on how much I weight and stuff but just give me the general amount