This calculator calculates for the amounts of stock chemicals to use to adjust the composition of a batch
with seven active ingredients. The initial weight of batch for adjustment to use is calculated given the
final weight of batch. The amount of diluent (commonly water) to use is also calculated if needed
to lower the concentration of a ingredient or component. Ideally, the purer a stock chemical used for active
ingredient concentration adjustment is the better. This calculator can handle general cases where all seven
components (plus diluent) can be present in a stock chemical.