A company makes two products, A and $B,$ using a single resource pool. The resource is available for $900$ minutes per day. The unit loads for A and $B$ are $10$ and $20$ minutes per unit respectively. The contribution margins for A and $B$ are $$20$ and $$35$ per unit respectively.

$1$

The company wishes to produce a mix of $60\%$ As and $40\%$ Bs$.$ What is the effective capacity $($units per day$)?$ Round your answer to two decimal places.

Group of answer choices

$72\mathrm{.}68$ units$/$day

$64\mathrm{.}29$ units$/$day

$43\mathrm{.}13$ units$/$day

$80\mathrm{.}35$ units$/$day