Format price with LiveData transformation

app/src/main/java/com/example/cupcake/model/OrderViewModel.kt

@@ -2,7 +2,9 @@ package com.example.cupcake.model
 
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.Transformations
 import androidx.lifecycle.ViewModel
+import java.text.NumberFormat
 import java.text.SimpleDateFormat
 import java.util.Calendar
 import java.util.Locale
@@ -21,7 +23,9 @@ class OrderViewModel : ViewModel() {
     val date: LiveData<String> = _date
 
     private val _price = MutableLiveData<Double>()
-    val price: LiveData<Double> = _price
+    val price: LiveData<String> = Transformations.map(_price) {
+        NumberFormat.getCurrencyInstance().format(it)
+    }
 
     val dateOptions = getPickupOptions()