Howto make sushi vinegar at home?

Ingredients

2 cups rice vinegar

1 1/2 cups white sugar

1 1/2 tablespoons salt

1/8 lemon,juiced

Directions:

Stir the rice vinegar,sugar,salt and lemon juice together in a saucepan until the sugar and salt have dissolved;bring the mixture to a simmer over low heat,but not allow to boil.Remove from heat and allow to cool completely.Store in refrigerator.