For the transformation t, what is t-1?

t : (x, y) (x + 4, y + 3)
t-1: (x, y)

a.) (x - 4, y - 3)
b.) (-4x, -3y)
c.) (x + 3, y + 2)

Acompany had forty one employees and ordered nine hundred eighty uniforms for them. if they wanted to give each employees the same number of uniforms, how many more uniforms should they order so they don't have any extra