L-
It appears what you have is best described by FI. They look to me like the Overseas ties you can get at walmart in 3 packs for a couple bucks. An experienced flyfisherman can look at those packs and maybe find a handfull of servicable flies on the entire rack. They are IMHO not worth buying. They are tied with oversized soft hackles, unnatural colors such as red collars, tails etc. Bright yellow wings, Hackles on drys too soft to support the weight of the fly, on hooks too big.....
That said I see a few I may use in your bunch.
#1 Winged wet - Might work for a sulphur - too big and too yellow.
#2 soft hackle wets - Non descript (Iso ?) but red tail kills it.
#3 olive emerger - Might get you a few fish
#4 Caddis?- looks too big - Might get you a few fish
#5 pair of trudes? -Non descript -Might get a few fish But black body that big??? I dunno
#6 soft hackle wet/dry - Non descript (????)
#7 Dry fly - might work for a Isonychia (slate Drake) but the tail is white.
#8 soft hackle wets - Non descript (Sulphur ?) but red tail and hackle kills it.
#9 White wet fly - but red tail kills it.
#10 Hopper - But the white color body and red tail kills it.
#11 soft hackle wets - Non descript (March Brown?) but red tail kills it.
Typical of the overseas sweatshop flies they take traditional patterns and then use the wrong colors,size materials/poor quality (hackle stiffness, webbyness) and tie them on the wrong sized hooks.
So what you have here is a box full of garbage. This may bruise your ego a bit right now but save these pics and in a few years you will agree. Ask your brother....he'll likely tell you the same. Its better to get the straight poop early rather than go flailing around with junk. Some of these may work on some stocked trout but frankly I would not carry these flies let alone tie one on.
If you don't tie and are looking fill some boxes, stick with purchasing named flies like "phesant tails, hares ears, caddis pupae, Elk hair caddis, Adams, sulphurs, cahills, bwos, wooly buggers, wets like partridge and yellow/green/orange, from a reputable shop(more expensive) or an online source for cheap flies. I don't buy flies so I don't have the sources but you are going to be putting yourself at a disadvantage using that box of junk. IMHO