(1) If the applicable assets of the estate are insufficient to pay all claims in full, the personal representative shall make payment in the following order: (a) costs and expenses of administration; (b) reasonable funeral expenses and reasonable and necessary medical and hospital expenses of the last illness of the decedent, including compensation of persons attending the decedent; (c) federal estate and Montana state estate taxes; (d) debt for a current support obligation and past-due support for the decedent's children pursuant to a support order as defined in 40-5-201; (e) debts with preference under federal and Montana law; (f) other federal and Montana state taxes; (g) all other claims. (2) A preference may not be given in the payment of any claim over any other claim of the same class, and a claim due and payable may not be entitled to a preference over claims not due.