The production manager for Beer etc. produces $2$ kinds of beer: light $($L$)$ and dark $($D$).$ Two resources used to produce beer are malt and wheat. He can obtain at most $4800$ oz of malt per week and at most $3200oz$ of wheat per week respectively. Each bottle of light beer requires $12oz$ of malt and $4oz$ of wheat, while a bottle of dark beer uses $8oz$ of malt and $8oz$ of wheat. Profits for light beer are $$2$ per bottle, and profits for dark beer are $$1$ per bottle. If the production manager decides to produce $400$ bottles of light beer and no bottles of dark beer, it will result in slack of

malt only

wheat only

both malt and wheat

neither malt nor wheat