Question
Lucy baked mocca, durian and blueberry wafers. There were one-fifth as many blueberry wafers as durian wafers and an equal number of blueberry wafers as mocca wafers. The cost of each wafer is given as shown.

1 blueberry wafer: $1.70
1 durian wafer: $1.90
1 mocca wafer: $1.80

If she collected $234 from selling all the wafers, how many durian wafers were there?
3 m

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Lucy baked mocca, durian and blueberry wafers. There were one-fifth as many blueberry wafers as durian wafers and an equal number of blueberry wafers as mocca wafers. The cost of each wafer is given as shown.

1 blueberry wafer: $1.70
1 durian wafer: $1.90
1 mocca wafer: $1.80

If she collected $234 from selling all the wafers, how many durian wafers were there?