California Code, Probate Code - PROB § 13563

(1) The fair market value at the time of the decedent's death, less the amount of any liens and encumbrances on the decedent's property at that time, of the portion of the decedent's property that passes to any person having a superior right by testate succession from the decedent.

(2) The net income the surviving spouse received from the portion of the decedent's property that passes to any person having a superior right by testate succession from the decedent.

(3) If the decedent's property has been disposed of, interest on the fair market value of the portion of the decedent's property that passes to any person having a superior right by testate succession from the decedent from the date of disposition at the rate of 7 percent per annum. For the purposes of this paragraph, “fair market value” is fair market value, determined as of the time of disposition of the decedent's property, less the amount of any liens and encumbrances on the decedent's property at the time of the decedent's death.