Please help if good with geometry

Tanya has $42 to spend at the dolphin island store. tshirts sell for $7 each and a pair of sunglases sells for $6.tanya buys 3 tshirts. how many pairs of sunglases can she buys with the amount of money she has left

I'll give brainliest if you answer right : )

Two triangles can be formed with the given information. use the law of sines to solve the triangles. b = 49°, a = 16, b = 14