Answer:
C: (6 x $5)+(6 x $4)+(12 x $3)
Explanation:
The total number of bulbs bought = 2 dozens = 2 x 12 = 24
• The cost per bulb for the first half-dozen = $5

• The cost per bulb for the next half-dozen = $4

Out of 24 bulbs, we have calculated the cost for 12.
• The number of bulbs left = 24 - 12 = 12.
,
• Each additional bulb is $3 per bulb.
The cost for the last 12 will be:

Therefore, the cost for the 2 dozen iris bulbs will be:

The correct choice is C.
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