"<span>B) Resource use, production, and distribution of goods and services" is the correct answer. Economics is really a study of limited resources, and how people make choices. </span>
When identical units of an item are purchased at different costs: <span>an inventory cost flow method must be used under both a perpetual and a periodic inventory system.
A perpetual inventory system will update your inventory on hand after each sale or purchase of inventory is made. A periodic inventory system is updated periodically, meaning, a company will give a time period they would like their sales and purchases to update in and the system will perform that. Both systems are great for a business but it's their option of how they are generated.
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<span>It is difficult because firms have a hard time executing strategies they develop. The vision the firms has is either too wide in scope, costs too much money, or uses too many resources to be truly viable. The strategy or deliverables may need to be altered or scrapped to get a fresh start.</span>