Dear
This letter will confirm [individual's] telephone conversation with you
today concerning an increase in our billing rate to [amount] per hour, effective
[date] It is necessary that we request this increase due to a rise in the cost
of conducting our business. We are faced with an increase in payroll taxes and
insurance, along with an increase in our overhead costs. In addition to the
above,we also seek a modest profit.
Attached are copies of our service agreement and we request that you sign
one copy and return it to us indicating your approval of this new rate.
-商务英语
daiy