Sheffield Corp. issues an $810,000, 15%, 10-year mortgage note on December 31, 2020, to obtain financing for a new building. The terms provide for annual installment payments of $161,394. Prepare the entry to record the mortgage loan on December 31, 2020, and the first installment payment on December 31, 2021. (Credit account titles are automatically indented when amount is entered. Do not indent manually. Record journal entries in the order presented in the problem.)

straight lines that are parallel to each other

Explanation: Q: A jeweler can potentially use two inputs in her handcrafted jewelry: copper or bronze. She finds that when she minimizes her costs, she either uses copper or bronze but not both. What must her isoquants look like?

An isoquant curve is defined as a line of equal or constant economic production on a graph, chart or map which describes all the combinations of inputs that produce the same level of output. If the jeweler either uses copper or bronze but not both, it means that the copper and bronze are perfect substitutes, that is,  they are two inputs that can be substituted for each other at a constant rate and at the same time maintaining the same output level. Her isoquants would appear as straight lines that are parallel to each other because all that matters is the sum of the two variables (copper and bronze), and not their individual values.