Answer:
The company which has the least expensive cartridge is:
LMN office company.
Explanation:
LMN Office Company sells 20 printer cartridges for $240.
This means that the cost of 1 printer cartridge is: $ 240/20=$ 12
Also, . XYZ Supplies has a box of printer cartridges for $150.
The box contains 12 cartridges.
This means that the cost of 12 cartridge is: $ 150
Hence, cost of 1 printer cartridge is: $ 150/12=$ 12.5
Hence, the company which has the least expensive cartridge is:
LMN Office Company.
( Since, 12 < 12.5 )