presented to the jury during plaintiffs’ and defendant’s closing arguments.
Juries are credited with having common sense and an average understanding of language. Clark v. Skaggs Companies, Inc., 724 S.W.2d 545, 554 (Mo.App.1986). We give credit to this jury for knowing that the notice contained the words “non-payment of premium” after plaintiffs told them it did. Since each element of an instruction submitted in the disjunctive must be supported by substantial evidence, the lack of such support for the third paragraph of Instruction 7 renders it erroneous and the judgment must be reversed. Saupe v. Kertz, 523 S.W.2d 826, 830 (Mo. banc 1975).
Plaintiffs next assert defendant was legally precluded from using the affirmative defense of cancellation. We reviewed both, cancellation for non-payment of premium and cancellation at plaintiffs’ request, and decide defendant was not precluded from using cancellation as a defense.
Plaintiffs assert cancellation for non-payment of premium was precluded because defendant did not plead and prove it. We agree that defendant did not prove nonpayment, although we find that the issue was tried by consent pursuant to Rule 55.-33(b). As noted previously, plaintiffs brought up the issue of non-payment of premium whenever possible; defendant merely responded to assertions.
Plaintiffs further claim that defendant is precluded from using the affirmative defense of cancellation at plaintiffs’ request because defendant did not originally deny plaintiffs’ claim on this ground. Plaintiffs point to the general rule that if an insurer denies liability on a particular ground it may not thereafter advance a different ground for denying liability, if the original denial was made with full knowledge of the facts. Farm Bureau Town and Country Insurance Company of Missouri v. Crain, 731 S.W.2d 866, 875 (Mo.App.1987).
Defendant’s cancellation notice citing non-payment of premium was not a denial of liability because, at the time it was sent, there was no claim pending. The notice was mailed June 23, 1982, approximately ten days before the fire. By cancel-ling, and stating a reason therefor on the notice of cancellation, defendant was not waiving all other defenses available. Defendant merely acted on the instructions of its agent, Dumont, and cancelled plaintiffs’ policy prior to the fire. The point is, therefore, denied.
Lastly, plaintiffs argue that the Missouri valued policy statutes should apply. §§ 379.140, 379.145 and 379.160, RSMo 1979. If these statutes do apply, and, on remand, judgment is in plaintiffs’ favor, plaintiffs are entitled to recover the full face value of the insurance policy, less depreciation in the value of the insured items. Stahlberg v. Travelers Indemnity Company, 568 S.W.2d 79, 83 (Mo.App.1978). They may also receive the policy limits of this policy even though they were paid the limits of another policy. § 379.145, RSMo 1979. The valued policy statutes apply to personal as well as real property. Duckworth v. United States Fidelity and Guaranty Company, 452 S.W.2d 280, 282 (Mo.App.1970); § 379.160, RSMo 1979.
The valued policy statutes were enacted in order to place the burden and responsibility of evaluating the insured’s interest and property on the insurer. DeWitt v. American Family Insurance Company, 667 S.W.2d 700, 707-708 (Mo. banc 1984). Under these statutes, the insurer is es-topped from denying that the value of the insured property, at the time the policy was written, was equal to the policy amount. Wells v. Missouri Property Insurance Placement Facility, 653 S.W.2d 207, 210 (Mo. banc 1983). The insurer bears the burden of proving depreciation. Absent such proof, the amount of the policy conclusively establishes the value of the property insured. Id.
Defendant argues that it was only liable for a pro rata share of the loss because of the following clause in the policy:
• Other insurance. If a loss covered by this policy is also covered by other insurance, we will pay only the portion of the loss that the limits of liability that applies under the policy bears to