BR400-403 $6.00BF (RusticMill.com)
Average Board Foot of each board = 7bf@$6.00 = $42.00 each

BR400: 1 1/2 x 10 1/4 x 74 30lbs
BR401: 1 1/2 x 10 1/4 x 74 30lbs
BR402: 1 1/2 x 10 1/4 x 74 30lbs
BR403: 1 1/4 x 10 1/4 x 74 28lbs...Surface Planed