While writing your business plan you think about how many sales you will need in your first few months of operation in order to start covering your costs. You're primarily worried about some of your fixed costs, like the monthly lease, utilities, and paying yourself a salary. You also need to figure out the total start-up costs involved in this venture and what your funding sources will be for them. The section of your business plan that will address these questions is the: a. Executive summary b. Product description and market analysis c. Marketing plan d. Operations plan