What we know:
(Also,
)
What we need to solve:
(This is equal to
)
How you have to subtract
with
to get:

Thus, the answer would be:

It's 48/200=0.24$ per a bead
She will have to pay 0.24*25=6$
The answer is C! All you have to do is subtract the numbers! :) (Also, could I get brainliest?)