in reply to Re^2: print array of hashes
in thread print array of hashes

True as that may be, sometimes it feels more comfortable to be explicit about what you mean. For example (and let's keep it simple):

my $total_price = ($item_price * $item_quantity) + $shipping_cost

In that example the parentheses aren't necessary because multiplication already has higher precedence than addition anyway, but I feel it improves readability.