What is the correct way to write three hundred nine million, fifty-eight thousand, three hundred four?

- - sitting erect, shoulders back, chest out, head up, spine straight

- - pen held loosely and comfortably in your hand

- - forearm resting lightly on the table

- - digit characters formed neatly and clearly, with uniform size and slant

3 0 9, 0 5 8, 3 0 4.