Crandle Manufacturers Inc. is approached by a potential new customer to fulfill a one-time-only special order for a product similar to one offered to domestic customers. The company has excess capacity. The following per unit data apply for sales to regular customers: Variable costs: Direct materials $170 Direct labor 90 Manufacturing support 135 Marketing costs 85 Fixed costs: Manufacturing support 145 Marketing costs 75 Total costs 700 Markup (40%) 280 Targeted selling price $980 What is the contribution margin per unit

ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'