paid by the hour, receiving time-and-one-half, double time, and triple time for overtime, Sunday, and holiday work, respectively.
In 1979, Oliver received checks totaling $11,103.11. In 1980, the checks totaled $12,572.95. In mid-1981, Oliver’s pay scale was raised from $6.71 per hour to $7.31 per hour; however, his total pay for that year almost doubled to $23,008.56. John M. Summerford, who as treasurer of Hayes was responsible for the issuance of pay checks, testified that $11,128.00 of this amount was overpayment made by computer error. Summerford testified that in addition to the amounts properly due the defendant by applying his hourly rates to hours worked each week, the computer added into the defendant’s check an extra $214.00 per week during all of 1981. Sum-merford testified that of the 3200 to 3500 Hayes employees, Oliver was the only person whose check was misdrawn and that the company had researched the computer error, but was unable to explain its origin.
By the time Oliver retired in early 1982, Hayes had discovered the error and had, apparently to no avail, asked Oliver to repay the $11,128.00. At that time, the company still owed Oliver two checks totaling $1,336.91, part of this amount representing vacation pay earned under the union contract but not yet paid. The company withheld the two checks as a credit against the repayment it contended it was due from Oliver. It also credited against the overpayment $2,361.69 in excess withholding taxes, which it apparently did not remit to the Internal Revenue Service, to reduce the amount allegedly due from Oliver to $7,429.40.
Oliver, who had dropped out of school before finishing the third grade and who could not read anything other than his name, testified at trial that both he and his wife realized something was wrong with his check from the first pay period of 1981 because the net pay exceeded the gross pay by five dollars. Oliver brought this to the attention of a Billy Myers who sent for Oliver to come to the office and who had a replacement check issued.
After Mr. Myers corrected the check for the first pay period of 1981, Oliver never brought another check to the company’s attention, as the following testimony established:
“Q [Defendant’s attorney] After you complained to Mr. Billy Myers on that first occasion about your check being wrong and you said he kind of laughed at you, did you make any further complaints about your check being correct or incorrect?
“A [Defendant] No sir. I didn’t know whether to go back there or not.
“A Because, see, you are not allowed to talk to the main bossmen there.
“Q They have got a system you have to go through to get to talk to those people?
“Q Well, didn’t you attempt to follow that system to find out if any of your checks were right or wrong?
“A Well, wasn’t no way to find out.”
Hayes International filed its complaint against Oliver on May 10, 1982, seeking to recover the $11,128.00. (On the date of trial, plaintiff reduced its demand to $7,429.40 to reflect the credits discussed above.) Oliver filed an answer raising the defenses of equitable estoppel, laches, no mutuality of mistake, and waiver. He also counterclaimed, alleging that plaintiff converted to its own use $2,361.69 originally withheld for payment to the Internal Revenue Service as taxes from the defendant's check and $643.20 which defendant was due as vacation pay, regular wages, and overtime.
On the date of trial, the trial court judge granted Hayes’s motion in limine which sought to exclude defendant's evidence on the conversion of the withholding taxes counterclaim and the counterclaim which alleged conversion of the $643.20 allegedly due the defendant for vacation pay and wages. Then, after both plaintiff and de