I wish to add a dynamic attribute to products. I am looking to add an attribute "Calorie" associated with food products and wish to add them in bundled products much in the same way as their price add up.For eg, if I have a platter of fruits and fruit A is 40 calories and food B is 30 calories. When I keep both of them in my platter the total calorie of the platter should be 70, i.e. the sum of both individual products. Is there a way to add a dynamic attribute or is there any other way to approach this ?