Answer:
To earn a profit atlease 30,001 units of thermostats must be sold i.e not less than 30,000 thermostats
Step-by-step explanation:
Data provided:
The combined cost for labor and material = $5 per thermostat
Total cost equation, C = 5x + 60,000
where, x is the number of thermostats
selling price of a thermostat = $7
The revenue equation, R = 7x
Now,
For the company to earn a profit
Revenue should be greater than the cost incurred
mathematically,
R > C
or
7x > 5x + 60,000
or
2x > 60,000
or
x > 30,000
Hence,
To earn a profit atlease 30,001 units of thermostats must be sold i.e not less than 30,000 thermostats