Sweet N' Sour Sauce

2/3 cup pineapple juice
1/2 cup vinegar
1/3 cup sugar
3 Tbs ketchup
1 Tbs soy sauce
1/2 Tbs rice flour

Pour all of the ingredients into a pot and let it come to a boil for 5-10 minutes. Remove from heat and let cool for 15 minutes before using.