Answer:
a. Amount to be paid = Merchandise price - Returns and allowances - Discount + Freight In
= $7,850 - $1,150 - ($7,850-$1,150)*2% + $200
= $7,850 - $1,150 - $134 + $200
= $6,766
b. Amount to be paid = Merchandise price - Returns and allowances - Discount
= $4,200 - $700 - ($4,200-$700)*1%
= $4,200 - $700 - $35
= $3,465