Problem in reading data with DLMreader package

Hi, I have the data in 11th and 13th (accommodation cost and transportation cost) column with , and USD and $ which I would like to remove, my tutor have asked specifically using DLMReader package, informat function, I have tried the following code follow the julia doc but it just doesn’t work, can anyone tell me what’s wrong with my code, please?
the instruct doc that I followed:

julia> using InMemoryDatasets,DLMReader
julia> import Downloads
julia> function rm(x)
rm (generic function with 1 method)

julia> d=filereader(data, quotechar='"', dtformat=Dict(3:4 .=> dateformat"m/d/y"), informat=Dict(11:13 .=> COMMA!∘rm))
ERROR: MethodError: no method matching filereader(::Dataset; quotechar::Char,

Thanks for any advice!