Based on the amount of money that Randy has more than Sandy and Mandy, the amount that Sandy has is $1,728.
First find out how much Randy has.
This can be found as:
= Amount that Mandy has x ( 1 + 20%)
= 1,800 x 1.2
= $2,160
The amount that Sandy has is:
= Amount Randy has / ( 1 + 25%)
= 2,160 / 1.25
= $1,728
In conclusion, Sandy has $1,728.
Find out more on percentages at https://brainly.com/question/990406.