How to avoid MVC client side validation for specific element ?

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C#

ASP.NET

MVC

MVC3

Hi
I am using Clint side validation for a form to submit some not null value and also some null-able Value but my validation not allowing null-able values.

here is my View Model

public int? ResourceId { get; set; }

       public int? Minutes { get; set; }

       [Required(ErrorMessageResourceName = "REQ_Gender", ErrorMessageResourceType = typeof(Resources.Messages))]
       public DateTime BookingDate { get; set; }

       [DataType(DataType.Time)]
       public DateTime? StartTime { get; set; }

       [DataType(DataType.Time)]
       public DateTime? EndTime { get; set; }

       public decimal? Price { get; set; }

       public bool IsFree { get; set; }

       public bool IsCourse { get; set; }

      [StringLength(500)]
       public string Reason { get; set; }

       public DateTime? PaymentDate { get; set; }


       public decimal? PartlyPaidAmount { get; set; }

But on submitting null value to Price and PartlyPaidAmount i am geting a validation msg as
"The field Price must be a number." and "The field PartlyPaidAmount must be a number."
please follow this link to see the result:
https://app.box.com/s/4abvfvsjzt7m6jdk5u47[^]

All i need is to submit the form with null value for Price and PartlyPaidAmount.

Thank you,