Madison Corporation sells three products $($M$,$ N$,$ and O$)$ in the following sales mix: $3$:$1$:$2.$ Unit price and cost data are:

M N O

Unit sales price $ $7$ $ $4$ $ $6$

Unit variable costs $323$

Total fixed costs are $$340,000.$ The contribution margin per composite unit for the current sales mix $($round to the nearest cent$)$ is: