Okay hear this someone came into my shop and stole $100 without my knowledge they came back to the store and spent $70 in items i gave $30 back how much money did i lose ?

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?