To calculate the total earnings of the wallpaper salesman, we need to consider both his base pay and the commission he earns from his sales.
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Base Pay: \[ \text{Base Pay} = 15,600 \text{ dollars} \]
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Sales Amount: \[ \text{Sales} = 25,400 \text{ dollars} \]
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Commission Rate: \[ \text{Commission Rate} = 16% = 0.16 \]
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Commission Earned: \[ \text{Commission} = \text{Sales} \times \text{Commission Rate} = 25,400 \times 0.16 \] \[ \text{Commission} = 4,064 \text{ dollars} \]
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Total Earnings: \[ \text{Total Earnings} = \text{Base Pay} + \text{Commission} = 15,600 + 4,064 \] \[ \text{Total Earnings} = 19,664 \text{ dollars} \]
Thus, the salesman’s total earnings last year were $19,664.
The correct answer is $19,664.