fix: negative prices with taxes #37
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−24
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So far, when dealing with negative prices we have been computing a negative tax amount as well, which is a bug.
Users typically use negative prices as a simple way to add discounts as line items, and due to misconfiguration or migration purposes, users sometimes end up with a tax rate attached to the discount as well.
It's fine to deduct the tax rate from the price if the price includes tax, but consider a negative tax on the Items computed is wrong bcoz a negative price is never a service or good, and adding a negative price to the Items means we will "reduce" the amount of tax the user is required to pay.