All you need is wing area and weight to calculate wing loading:

1007 sq in divided by 144 (one square foot) equals 6.993 sq ft.

11.9 lbs times 16 (ounces in a pound) equals 190.4 ozs.

190.4 divided by 6.993 equals 27.227 ounces per sq ft wing loading.

12.3 x 16 = 196.8 ozs.

196.8 / 6.993 = 28.142 wing loading.