Subject to all restrictions and the availability of funds, value loss payments for qualifying losses will be determined by:
(a) Multiplying the field market value of the crop before the disaster by 50 percent;
(b) Subtracting the sum of the field market value after the disaster and value of ineligible causes of loss from the result from paragraph (a) of this section;
(c) Multiplying the result from paragraph (b) of this section by the producer's share;
(d) Multiplying the result from paragraph (c) of this section by 55 percent plus whatever factor deemed appropriate to reflect savings from non-harvesting of the damaged crop or other factors as appropriate;
(e) Subtracting the result from paragraph (d) of this section from the producer's share of any salvage value, if applicable.