Answer: $228 is spent by her overall.
Step-by-step explanation:
Since we have given that
Number of dimmer switches = 12
Cost of dimmer = $25
Total cost will be
[tex]25\times 12=\$300[/tex]
According to question, he will receive $6 credit for each one she returned .
Number of switches she returned = 12
Total amount she will be credited is given by
[tex]12\times 6\\\\=\$72[/tex]
Total amount she spend overall is given by
[tex]\$300-\$72\\\\=\$228[/tex]
Hence, $228 is spent by her overall.
