Which of the following is not one of the benefits of current$-$year and cumulative expenditures for camera$/$drone product R&D$?$

Increasing the productivity of PATs in assembling camera$/$drone models $($because of easier to assemble product designs$)-$productivity gains occur as soon as current and cumulative R&D spending reach levels sufficient to identify and develop easier to assemble product designs

Lowering the costs of components, accessories, and enhancement features used in assembling cameras$/$drones

Reducing warranty claims and warranty costs $($these two benefits show up at the beginning of the following year$)$

Reducing the need to spend money either on search engine advertising for drones or on having sales promotions for action cameras.

Boosting a company's $\frac{P}{Q}$ ratings $($the size of this benefit varies with the current and cumulative amounts spent and shows up in the $\frac{P}{Q}$ ratings at the beginning of the following year$)$