In all of the following problems, use these tax rates and taxable wage: OASDI4.2% on the first $110,100; HI1.45% on all taxable wages. Refer to Instruction 3-1. Fess receives wages totaling $74,500 and has net earnings from self-employment amounting to $51,300. In determining her taxable self-employment income for the OASDI tax, how much of her net self-employment earnings must Fess count?