Kathy is 48 years of age and self-employed. During 2018 she reported $102,000 of revenues and $40,800 of expenses relating to her self-employment activities. If Kathy has no other retirement accounts in her name, what is the maximum amount she can contribute to a simplified employee pension (SEP) IRA for 2018? (Round your final answer to the nearest whole number)

I came up with 15,300, however the choices are

11,375

17,153

61,100

55,000

Any help on how this is figure out would be greatly appreciated. I cannot seem to figure this one out.