A taxpayer is considering two mutually exclusive alternatives: Alternative A is to hire a tax planner for $$20,000,$ who, if successful $($@$75\%$ probability$),$ would save the taxpayer $$24,000,$ net of taxes. Alternative B is to hire a marketing consultant for $$18,000$ to change the advertising strategy, which, if successful $($@$80\%$ probability$)$ would reduce advertising costs by $$25,000$ without affecting revenue. At what whole number $($e$.$g$.15\%)$ tax rate between $15\%$ and $35\%$ is the net effect of the alternatives closest to each other $($less than $$100$ difference$).$ Please enter your response as whole number, without the $"\%".$ Hint: multiply the probability of success by the after tax effect to get the expected value, after tax and compare these results.