No its not all the time the same their will always bec differences. In mathematics different number bisan pag mo puti ang uwak different gyud.
Diesel P33 - P32 = P1(ug mopalit kag 1 liter lng cebu nalang clear na kaayo)
Baboy P120 - P100= P20(ug mopalit kag 1 kilo lng cebu nalang clear gihapon)
E6600 P12300 - P11495 = P805 ( Ug may choice kang mag papalit padala sa manila pdala kanalang or else ug wala cebu kanalng palit)
Its clear as mud 1liter of diesel and 1 kilo baboy is not as heavy as the E6600 ug ipadala lng.