docs: added guide on how to get product variant prices (#8282)

www/apps/resources/app/commerce-modules/pricing/price-calculation/page.mdx

@@ -60,7 +60,7 @@ Both prices are returned in an object along with the following properties:
     {
       name: "calculated_amount",
       type: "`number`",
-      description: "The amount of the calculated price, or `null` if there isn't a calculated price."
+      description: "The amount of the calculated price, or `null` if there isn't a calculated price. This is the amount shown to the customer."
     },
     {
       name: "is_original_price_price_list",
@@ -70,7 +70,7 @@ Both prices are returned in an object along with the following properties:
     {
       name: "original_amount",
       type: "`number`",
-      description: "The amount of the original price, or `null` if there isn't an original price."
+      description: "The amount of the original price, or `null` if there isn't an original price. This amount is useful to compare with the `calculated_amount`, such as to check for discounted value."
     },
     {
       name: "currency_code",
@@ -105,7 +105,7 @@ Both prices are returned in an object along with the following properties:
         {
           name: "price_list_type",
           type: "`string`",
-          description: "The price list's type."
+          description: "The price list's type. For example, `sale`."
         },
         {
           name: "min_quantity",
@@ -137,7 +137,7 @@ Both prices are returned in an object along with the following properties:
         {
           name: "price_list_type",
           type: "`string`",
-          description: "The price list's type."
+          description: "The price list's type. For example, `sale`."
         },
         {
           name: "min_quantity",