An adult whose both lower limbs are charred along with genitalia has.......... burns

.both legs+genitalia = 2 x 18 + 1 = 37 each upper extremity 9% of TBSA each lower extremity 18% of TBSA anterior or posterior trunk 18% of TBSA head and neck for 9% perineum for 1% Ref. SRB 5th ed.pg 129