Raiden18

class CartViewModel(
  private val cartInteractor: CartInteractor
): ViewModel() {
 
  private val approximatePriceOfProductsLiveData = MutableLiveData<String>()
  
  init {
    val cart = cartInteractor.getCart()
    val approximatePriceOfProducts : BigDecimal = TODO("Must be calculated")
    val approximatePriceOfProductsLiveData = approximatePriceOfProducts.toString()

Raiden18

class CartInteractor(
  private val cartRepository: CartRepository
) {
 
  fun getCart() : Cart {
    return cartRepository.getCart()
  }
}

Raiden18

data class Cart(
 val products: List<Product>
)