Scottie is the manager of an investment center within Hamilton Company. Using the information below, calculate (a) return on total assets and (b) investment center residual income. 
Definitions:
Decreasing Costs
A situation where the expenses of producing a good or service fall over time, typically due to efficiency improvements or economies of scale.
LIFO Method
An inventory valuation method called "Last In, First Out," where the cost of the most recently purchased items is the first to be expensed as cost of goods sold.
Net Income
Refers to the total earnings or profit of a company after subtracting all expenses and costs from its total revenue.
FIFO Method
"First In, First Out," an inventory valuation method where goods first purchased or produced are the first to be sold, affecting cost of goods sold and inventory value.
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