[R] how to ignore or omit somethings while reading the data table

[mrafi]

hello respected ppl...
am a engg. student...i was trying to use R in statistical calculations
now the problem is..i imported a huge tsv file onto R...it has a column
which gives cost...and it has "$" with each numerical value in this
column...it is something like this..$.05,$.1,$.075...and so on..
R is reading it as "character vector"...
i tried using all the arguments but could only change it to a "factor"
i want to read it as numericals...and perform further operations..
i know it is a stupid problem but can any1 help me get outta this...
thank you all...!!!
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