FIFO and inflationary environment

Hello,
When there is quite some inflation in subsidiary but no offical hyperinflationary environment, ccy of subsidiary is depreciating.

What is the impact on gross profit margins ?

Looking for difference between FIFO-LIFO and current method-temporal method.

FIFO should be higher GP margin right because of inflation ?
But current method - temporal method, does this make any difference? Both use average rate for sales and cogs but for inventory how does this play out in terms of the ccy.