The units of Manganese Plus available for sale during the year were as follows: 
There are 15 units of the product in the physical inventory at November 30. The periodic inventory system is used. Determine the difference in gross profit between the LIFO and FIFO inventory cost systems.
Definitions:
Aggregate Expenditure
The total amount of spending in the economy that includes consumption, investment, government purchases, and net exports.
Simple Spending Multiplier
The ratio of a change in real GDP demanded to the initial change in spending that brought it about; the numerical value of the simple spending multiplier is 1/(1 + MPC); called “simple” because only consumption varies with income.
Marginal Propensity
Describes the portion of additional income that an individual is willing to spend on consumption rather than saving.
Off-Balance Sheet Financing
Off-balance sheet financing is the use of funding or financial activities not recorded on the company's balance sheet to keep debt ratios low.
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