25000 x 10% = $2500 in sales commission.
She works 10 hours per week at 7.5 an hour (and we assume she works every weekend for a total of 52 weekends). That gives her $75 x 52 = $3900 in wages earned.
She makes $6400 in her part time gig and $26000 in her full time gig for a total of $32400 combined annual income.