Koi Event Management Group$$s operational data from January to April is given as follows:

$($Month : Marketing Expense$)$

Jan: $$9,404\mathrm{.}80$

Feb: $$9,592\mathrm{.}80$

March: $9,496\mathrm{.}92$

April: $9,686\mathrm{.}76$

Based on the operational data above, calculate the marketing expense for Koi Event Management Group for May.