homemade strawberry jam calories

ChasityLindsey

Just entered my strawberry jam recipe into the system and according to this it is only 405 calories for an entire pint. How can this be right. I double checked and I added everything correctly.
recipe
6 cups mushed strawberries
7 cups sugar ( I know wow right)
1 1/4 boxes fruit pectin
1/4 cup lemon juice.