1 The hypothalamus, pituitary gland, and the gonads (ovaries, testicles) operate in a feedback loop, producing and maintaining the levels of sex hormones (androgens and estrogens) that are mainly responsible for the primary and secondary changes of puberty.
Calculation: Here is the formula for FIP: FIP = ((13*HR)+(3*(BB+HBP))-(2*K))/IP + constant. The constant is solely to bring FIP onto an ERA scale and is generally around 3.10. You can find historical FIP constant values here, or you can derive the constant yourself.
1 Multiply your gross pay by the current FICA rate. 2  For example, if your gross pay is $1,425, your FICA tax is $109.01 (1,425 X .0765). 3  Subtract this number, your pretax withholdings, and federal income tax to determine your net pay. When determining your net pay, or take-home pay, you must also determine your FICA taxes. 2  Refer to IRS Publication 15 to determine the current FICA tax rate, which is 7.65 percent as of the 2012 tax year. 3  Multiply your gross pay by the current FICA rate.