That seems awfully pricey, we offer individual quarts of the Subaru HP 75W90 to forum members at $9.42/qt so $37.68 for 4/gallon. We would be happy to ship it, it costs $14.00 via Fed Ex to PA.
I will also note that Extra-S, the ever popular trans fluid has long been discontinued and this is the HP Gear Oil Replacement by Idemitsu. We also carry Motul and Amsoil if you would prefer one of those options.
Thanks,
Jackie