The Bison Combo double burger at Burger Girl Diner has held steady at $14 since 2019. May 2, 2022 3600 × 2600 Inflation poses tough pricing choices for chefs and owners The Bison Combo double burger at Burger Girl Diner has held steady at $14 since 2019. The Bison Combo double burger at Burger Girl Diner has held steady at $14 since 2019.