Accordingly, the appellant says, Ms. Brake worked for it only for
approximately 13 years and an appropriate period of reasonable
notice would be eight to ten months, inclusive of any statutory
severance required by the Act and subject to mitigation.
 I see nothing in this argument.
 I begin with this important preliminary observation:
the reasonable notice period for wrongful dismissal was not
20 months in this case. The 20-month period included Ms. Brake’s
entitlement to termination and severance pay under the Act. The
significance of this point will become evident when I deal with the
question of what constitutes mitigation income in issue #5.
 There is no question that Ms. Brake worked for PJ-M2R
for 13 years. In finding that Ms. Brake had the equivalent of
20 years of service with PJ-M2R, the trial judge took into
consideration the credit letter that Mr. McKenna sent to
Ms. Brake when she began working for PJ-M2R.
 For ease of reference, the credit letter is set out again
This letter is to confirm Esther Brake length of service credit.
Esther joined us in July of 1999. She worked for 13 years in Corner Brook
prior to joining PJ-M2R Restaurants. 50% of her service time will be
credited towards full time benefits. This means that she will be credited
with 7 years of Full Time service as of 1999.
Perry McKenna Owner/Operator
 The appellant maintains that the credit letter was
intended solely to credit Ms. Brake with service time for purposes
of the calculation of benefits. The trial judge interpreted the
credit letter differently. He found that, in recognition of Ms.
Brake’s work experience and the associated value that she
brought to PJ-M2R, the credit letter was the appellant’s acknowl-
edgment that it credited her with having seven years of full-time
service with it. The trial judge added the seven years of credited
service to Ms. Brake’s 13 years of actual service and found that
she had the equivalent of 20 years of service with PJ-M2R.
 While the credit letter does include the sentence that
“50% of her service time will be credited towards full time bene-
fits”, the first line of the credit letter indicates that its purpose is
“to confirm Esther Brake length of service credit”. Furthermore,
the last sentence in the credit letter is unequivocal. It states:
“This means that she [Esther Brake] will be credited with
7 years of Full Time service as of 1999.”
 Given the plain language in the credit letter and in
light of the deference that this court owes to the trial judge’s