For Loop in T-SQL?

I am trying to write a new stored proc based off an exisiting one that counted the number of ads placed and inserted the data into a table. But now I want to break it down by class, so I am wondering if there is such a thing as a For Loop in T-SQL. (I am usually an ASP programmer and only put on the db hat when needed).
So here is the existing Stored Proc:
      declare
            @PAID int,
            @FREE int

            select @FREE = count(*)
            from submitqueue
            where cost = 0
                  and processstatus not in (4,5,6)
      
            select @PAID = count(*)
            from submitqueue
            where cost > 0
                  and processstatus not in (4,5,6)
      
            BEGIN
                  /* INSERT FREE AD STATS */
                  insert into ADCOUNTS (
                        DATE,
                        COUNT,
                        TYPE
                  )
                  values (
                        getdate(),
                        @FREE,
                        'FREE'
                  )
                  /* INSERT PAID AD STATS */
                  insert into ADCOUNTS (
                        DATE,
                        COUNT,
                        TYPE
                  )
                  values (
                        getdate(),
                        @PAID,
                        'PAID'
                  )            
                                END
 

I have created the new table called ADCOUNTSBYCLASS and it is the same makeup of ADCOUNTS except it had a new field called CLASS. Our classes go from 10 to 350 and have an increment of 10. So I need to do something like:

      declare
            @PAID int,
            @FREE int
                                @CLASS int

                                For @CLASS = 10 to 350 step 10
            select @FREE = count(*)
            from submitqueue
                      where cost = 0
            and processstatus not in (4,5,6)
                                and class = @CLASS
      
            select @PAID = count(*)
            from submitqueue
            where cost > 0
            and processstatus not in (4,5,6)
                                and class = @CLASS

      
            BEGIN
                  /* INSERT FREE AD STATS */
                  insert into ADCOUNTSBYCLASS (
                        DATE,
                        CLASS,
                        COUNT,
                        TYPE
                  )
                  values (
                        getdate(),
                        @CLASS,
                        @FREE,
                        'FREE'
                  )
                  /* INSERT PAID AD STATS */
                  insert into ADCOUNTSBYCLASS (
                        DATE,
                        CLASS,
                        COUNT,
                        TYPE
                  )
                  values (
                        getdate(),
                        @CLASS
                        @PAID,
                        'PAID'
                                            NEXT
    END

Can you do something like this in T-SQL? Or do I have to hardcode each instance of class?