Format table columns as percent, currency for pdf output (Rmarkdown)

I have a Rmarkdown document in which I need to produce a table. The table has several columns, some of which are currency and some others are percentages. I need to produce a pdf output.

Sample data

This will be enough:

library(data.table)
df <- data.table(x = letters[1:3], y = c(10.20, 20.501, 30.3222), z = c(0.6, 0.065, 0.95))

Alternatives I tried

I'm aware I can format each column for what I need, like this:

kable(df[, .(x, paste0("$", round(y, 0)), paste0(round(100 * z, 1), "%"))

Also, if I had html output instead of pdf, I could do something like

library(DT)
datatable(df) %>% formatCurrency(columns = 2, digits = 0) %>% formatPercentage(columns = 3, digits = 1)

Difficulties I've had

I can't use the DT::datatable approach, as my output is pdf, and DT doesn't produce pdf / latex output.

I wouldn't like to use the kable approach, as it would be cumbersome to produce paste0 code for each different case.

What I'd like / want:

An option similar to the DT approach that produces pdf output.

How can I achieve that?