i dont think you can do 135 burgers but
ok, buddy, lets do the math
135 burgers @ 1/3lb/burger = 45 lbs
45 lbs * $7/lb = $315 of meat
the buns, toppings, and condiments, usually cost 50% of the meat, so +$160
this is a lot of meat for a standard home grill
assuming a ABS (average burger size)...