What is the expanded form of this number?

503.208


(5×100)+(3×1)+(2×1/10)+(8×1/100)

(5×100)+(3×1)+(2×1/100)+(8×1/1,000)

(5×100)+(3×1)+(2×1/100)+(8×1/100)

(5×100)+(3×1)+(2×1/10)+(8×1/1,000)