Wing Area 203.8 sq.in.
Wing Loading 2.61 oz./sq.ft.
Flying Weight 2.8oz (86grams)

What is wrong with my math below?

203.8 sq.in. / 144 = 1.4153 sq.ft.

2.8 oz / 1.4153 sq.ft. = 1.9784 oz./sq.ft. (??? but this is not 2.61 oz./sq.ft.???)

1.9784 oz./sq.ft. / 16 = 0.12365 pound/sqft