Please help me with project

I would like to please help, I need a project that adds the value of these two entities (measured in gb byte from my modem)
sensor.fritzbox_bytes_sent
sensor.fritzbox_bytes_received
if the sum of these two entities exceeds 38 gb, send me a notification via the pushover_info service
please help me is urgent

Create a template sensor that sums the two sensor values. Then create an automation with a numeric state strigger when the value of this sensor goes above 38 and asan action send a notification to pushover.

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