Answer:. $70
Step-by-step explanation: FROM the information provided, we can begin to determine an equation. Now the first sentence;
1)Let the number of $5 bills be X
2)The number of $1 bills will be 3 times x....., And that gives 3x
3)The number of $10 bills will be x-2 ( From the third sentence
Adding 1)+2)+3) we must have 18 as stated in the first sentence.
Consequently, we have;
x+3x+(x-2) = 18
Solving for x we get x=4.
Now substitution the value of X in the three equations.
1) 5 of $5 bills =$25
2) 15 of $1 bills = $15
3) 3 of $10 bills =$30
Adding, we have $70