need to place tags for remarketing

There are ready-made fields, tell me where to insert, if not, how much will it cost to place these tags? 1. You need to add an event tag to the successful order page <!-- Event snippet for Purchase on site conversion page --> <script> gtag('event', 'conversion', { 'send_to': 'AW-**********/***************', 'value': <order amount>, 'currency': 'USD', 'transaction_id': <order id or number> }); </script> 2. The following tags for dynamic remarketing must be placed on the relevant pages of the site: on the product view page: gtag('event', 'view_item', { 'send_to': 'AW-*********', 'value': <Product price>, 'items': [{ 'id': <Product ID>, 'google_business_vertical': 'retail' }] }); when adding an item to the cart: gtag('event', 'add_to_cart', { 'send_to': 'AW-*********', 'value