If she were to keep her base project fee the same but increase her hourly rate by $5, what would be the total cost for a 9-hour survey project? A $584
B $544
C $539
D $459

So don't take my word i'm not exactly a mathematical person but i would assume a. because while selling the soap every month you increase in sells so you would by 11 percent. the you would get the factor 0.89 which if i had to guess would be the monthly profit over 11 probably wrong tho