Wildhorse Company completes and transfers out $15,600$ units and has $2,600$ units of ending work in process that are $25\%$ complete as to conversion costs. Materials are entered at the beginning of the process, and there is no beginning work in process. Wildhorse uses the FIFO method to compute equivalent units. Assuming unit materials costs of $$3$ and unit conversion costs of $$7,$ what are the costs to be assigned to units $($a$)$ completed and transferred out and $($b$)$ in ending work in process?

Costs to be assigned

$($a$)$ Completed and transferred out $

$($b$)$ Ending work in process

$