A lever in like a pully becasue it can pull just as so. Hope that helped. It is what my teacher taught me.
3 letters to US = 3*0.94 = 2.82
2 local letters = 2*0.44 = 0.88
checking: 2.82+0.88 = 3.70
to get rid out of 0.04 cents you have to multiply it by 5. so total number of letters would be 5.
Following are calculation to the given eqution:
Given:

To find:
Solve the equation.
Solution:

Therefore, the final solution is "
".
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Answer: Check explanation.
Step-by-step explanation: I think its 0. Not sure. Hope this helped!