The landlord claimed and the trial court agreed that the provision allows for the assessment of a $5 per day late charge as to each month’s rent, from the date of delinquency to the date of trial. This interpretation resulted in the remarkable assessment of $14,485 in late charges on delinquent rent of $3,600. This is because the late fees are “stacked” as to each *477month’s delinquency. Thus, when lessees were delinquent as to six months’ rent, they were being assessed a late-payment charge of $30 per day, $5 per day as to each month’s rent. However, the provision is also reasonably susceptible of meaning that there will be an assessment of a $5 per day late charge as to the total delinquent rent from the date of delinquency to the date of trial, resulting in the assessment of a late-payment charge of $2,795. Because we must construe ambiguous contract language in favor of the non-drafter, the lessees here, we find the trial court erred in its assessment of $14,485 in late-payment charges. Pursuant to Rule 84.14, we modify the late-payment award to $2,795.