Determine the sales curve percents by month on the basis of the following unit sales curve data for one misses' swimwear style: February, $10$ units; March, $22$ units: April, $32$ units; May, $48$ units; June, $66$ units; and July, $22$ units.

You are planning the sales of the same style of swimsuit as that in problem $7$ for the coming plan period. You estimate that this year you will sell $260$ of the suits. On the basis of the percentage sales curve you found in problem $7,$ calculate planned unit sales by month so that purchases can be made for this year.