Interfaces exercise in kotlin

interfaces.kt

interface Sellable {
    var priceInEuros: Int
    var priceInDollars: Int
        get() = (priceInEuros * 1.06).toInt()
        set(value) {
            priceInEuros = (value / 1.06).toInt()
        }
}

interface Describable {
    val id: String
    val name: String
    val description: String
        get() = "[$name] - $id"
}

interface Product : Sellable, Describable

class TShirt(
    override val id: String,
    override var priceInEuros: Int
) : Product {
    companion object {
        private const val NAME: String = "T-Shirt"
    }

    override val name: String = NAME
}

class Jeans(
    override val id: String,
    override var priceInEuros: Int
) : Product {
    companion object {
        private const val NAME: String = "Jeans"
    }

    override val name: String = NAME
}