A factory has three types of machines, each of which works at its own constant rate. If 7 Machine As and 11 Machine Bs can produce 305 widgets per hour, and if 8 Machine As and 22 Machine Cs can produce 600 widgets per hour, how many widgets could one machine A, one Machine B, and one Machine C produce in one 8-hour day?	Choose the correct option:
A) 400 B) 440 C) 550 D) 625 E) 700
Let Machine A produce A widgets per hour. B produce B widgets per hour and C produce C widgets per hour.   7A+11440=305 ---(1)   8A+22C=600 ---(2)   Dividing (2) by 2   4A+11C=300.....(3)   Adding (1)(3)   11A+11440+11C = 605   A+440+C=55 per hour   So for eight hrs = 55*8= 
<gadget id="calculator">55*8</gadget>
<output>440</output>
440= Answer = 440
<result>B</result>
A factory has three types of machines, each of which works at its own constant rate. If 7 Machine As and 11 Machine Bs can produce 305 widgets per hour, and if 8 Machine As and 22 Machine Cs can produce 600 widgets per hour, how many widgets could one machine A, one Machine B, and one Machine C produce in one 8-hour day?