$2800$:$55$:$45$HeloAn electronics firm produces two models of pocket calculators: the A$-100($A$),$ which is an inexpensive four$-$function calculator, and the B$-200($B$),$ which also features square root and percent functions. Each model uses one $($the same$)$ circuit board, of which there are only $2,500$ available for this week's production. Also, the company has allocated a maximum of $800$ hours of assembly time this week for producing these calculators, of which the A$-100$ requires $15$ minutes $(25$ hours$)$ each, and the B$-200$ requires $30$ minutes $(\mathrm{.}5$ hours$)$ each to produce.The firm forecasts that it could sell a maximum of $4,000-100\text{'}$s this week and a maximum of $1,000$ B$-200\text{'}$s$.$ Profits for the A$-100$ are $$1\mathrm{.}00$ each, and profits for the B$-200$ are $$4\mathrm{.}00$ each.What is the assembly time constraint $($in hours?eBookMultiple Choice$1$ A $+1$ B $58000\mathrm{.}25$ A $+0\mathrm{.}5$ B $8000\mathrm{.}5$ A $+0\mathrm{.}25$ B $8000\mathrm{.}25$ A $+1$ B $8001$ A $+0\mathrm{.}5$ B $800$