How do I get the probability of a non-categorical variable, given a certain set of parameters?

Question

For example, let's say I have the following conditional probability:

P(competitive=1(yes) | currency=EUR, sellerRating=1000)

If I run the following code, I'll get a probability table:

library(e1071)
nb.model <- naiveBayes(Competitive~., data=trainLabel)
nb.model

So when competitive=1 and currency = EUR, the probability is 0.283.

But how would I get the probability for sellerRating=1000, given competitive=1 and currency=EUR?

With the above code, it seems like getting the probability for categorical variables is easy, but I don't know how to get it for exact numbers.