Hi Sacha, I believe by "price per kg" you're referring to price per variant. If that's the case, Replo dynamically pulls all your variant prices. To display the price for each variant, you'll need to understand how dynamic data works in Replo. The Loom video in our help doc covers this topic, with pricing discussed specifically at minute 3:03.
If this doesn't address your question, could you provide more details about what you mean by "showcase price per kg"?