Bob's Blasting must implement a manufacturing process that reduces the amount of particles and dust emitted into the air. Two processes have been identified that provide the same level of reduction. The first process is expected to incur $$220,000$ of fixed cost and add $$40$ of variable cost to each blasting job. The second process has fixed costs of $$100,000$ and adds $$70$ of variable cost per blasting.

a$.$ What is the break$-$even quantity beyond which the first process is more altractive?

The break$-$even quantity is castings $($Enter your response as an integer.$)$

b$.$ What is the difference in total cost if the quantity produced is $10,000?$

The total cost of is greater The difference in total cost is $$.($Enter your response as an integer.$)$