Charging for babysitting

I have a 6 1/2 month old and I am wanting to babysit to be able to stay at home with my baby but I’m wondering how much I should charge. I have worked in three day cares, nannied and babysat all my life I am CPR certified and have lots of experience and references. I just don’t know how much to charge per child per hour per day per week. I am considering watching two children a 10-month-old and a three-year-old at the comfort of their home 2 to 3 days a week