wrong computation in salary

SECTION 14. Deduction for loss or damage. — Where the employer is engaged in a trade, occupation or business where the practice of making deductions or requiring deposits is recognized to answer for the reimbursement of loss or damage to tools, materials, or equipment supplied by the employer to the employee, the employer may make wage deductions or require the employees to make deposits from which deductions shall be made, subject to the following conditions:

(a) That the employee concerned is clearly shown to be responsible for the loss or damage;

(b) That the employee is given reasonable opportunity to show cause why deduction should not be made;

(c) That the amount of such deduction is fair and reasonable and shall not exceed the actual loss or damage; and

(d) That the deduction from the wages of the employee does not exceed 20 percent of the employee's wages in a week.