Bilkins Financial Advisors provides accounting and finance assistance to customers in the retail business. They have 4 professionals on staff, plus an office with 6 clerical staff. Total compensation, including benefits, for the professional staff runs about $576,000 per year, and they normally have about 8,000 billable hours per year. Professional staff keep detailed time sheets distributed by client number. Office and administrative costs total $754,000 a year.

Bilkins allocates professional time and administrative costs to clients monthly, using allocation rates based on billable hours. During July, Bilkins' professionals spent 36 hours on their client, Soupy Sales. Bilkins adds a 25% markup on their costs to calculate amount billed to the customer. How much did Bilkins bill their customer Soupy Sales for the month of July?

a) $5985

b) $6633

c) $7481.25

d) $6833.25