Select the correct answer from each drop-down menu.
A pen manufacturer produces three types of pens: ballpoint pens, rollerball pens, and fountain pens. The company produces three variations of each
type of pen, keeping the cost of production the same for each variation. The table gives the number of pens of each type sold.
Ballpoint Rollerball Fountain
Variation 1 2,400
1,400
550
Variation 2 3,100
2,000
370
Variation 3 2,850
1,100
720
The cost of production is $1 per ballpoint pen, $2 per rollerball pen, and $4 per fountain pen
The total cost of production is $
for variation 1, S
for variation 2, and $
for variation 3.
