What is the purpose of a check sheet?

A. To organize data on the frequency and sequence of occurrence of defects in order to identify patterns, relationships and possible immediate remedies
B. To develop a checklist of activities that are necessary to prevent defects, prior to beginning an operation or process
C. To check on the health of a process using sampling

Until recently, hamburgers at the city sports arena cost $4.70 each. the food concessionaire sold an average of 13 comma 000 hamburgers on game night. when the price was raised to $5.40, hamburger sales dropped off to an average of 6 comma 000 per night. (a) assuming a linear demand curve, find the price of a hamburger that will maximize the nightly hamburger revenue. (b) if the concessionaire had fixed costs of $1 comma 500 per night and the variable cost is $0.60 per hamburger, find the price of a hamburger that will maximize the nightly hamburger profit.