[tex]45.6+12.05-7+10.64-11.9[/tex]
[tex]57.65-7+10.64-11.9[/tex]
[tex]50.65+10.64-11.9[/tex]
[tex]61.29-11.9[/tex]
[tex]=49.39[/tex]
49.39 is correct answer.
Hope this helps.
Thanks!
-Charlie
