Marshall tool and die would like to offer a special product to its most loyal customers. however, given its concerns with the fragile economy, marshall wants to limit its maximum potential loss on this product to the firm's initial investment in the project. marshall expects to sell the product to its loyal customers for $18.00 per unit. the product has a variable cost of $6.00 per unit. the fixed costs are estimated at $18,000, and the depreciation expense is $9,000. what is the minimum number of units the firm should pre-sell to ensure its potential loss does not exceed the desired level?

1,500 units
1,680 units
1,840 units
2,030 units
2,200 units

Problem 3: access control pokeygram, a cutting-edge new email start-up, is setting up building access for its employees. there are two types of employees: managers and engineers, and there are three departments: security, networking, and human resoures. each employee works in a single department, and each department is housed on a different floor. managers are allowed access to any floor, while engineers are allowed access only to their own floor. there are three badge-operated elevators, each going up to only one distinct floor. every employee has one badge. pokeygram wants to use the best possible access control method in order to minimize delay for the elevators (a) access control matrix, 1. which of the following would you recommend that pokeygram use: (b) access control lists, or (c) capabilities? make sure to justify your answer. 2. what, if any, would be the benefits (and/or disadvantages) of using rbac (role-based access control) in this situation? keep your solution for this problem limited to 10-12 lines of text.