Cranberry Jello Salad

This is a great jello salad that I bring often to potlucks.

1 can whole cranberries
1 (11 oz.) can mandarin oranges
1 (8 oz.) can crushed pineapple
1 sm. pkg. raspberry jello
1 sm. ctn. cool whip

Drain juice from the fruits into a measuring cup. Add enough water to make 1 1/4 cup. Bring to a boil; dissolve the jello in the boiled mixture. Let cool and slightly thicken. Add fruit and cool whip. Mix. Serve chilled.