Question
In a stall, a packet of tarts cost $3.60. For every 6 packets of tarts purchased, an additional 3 packets of tarts were given free. Erika made her purchase and left the stall with 20 packets of tarts. How much did Erika pay in total?
4 m

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In a stall, a packet of tarts cost $3.60. For every 6 packets of tarts purchased, an additional 3 packets of tarts were given free. Erika made her purchase and left the stall with 20 packets of tarts. How much did Erika pay in total?