The ABC Office Products Company sells its Big Button calculators for $$8$ to distributors $($minimum quantity of $48)$ and $$12$ to retailers $($minimum quantity of $12).$ A single Big Button calculator costs ABC $$4$ to manufacture.

$1.$ What is ABC$$s markup per unit when selling to retailers?

a$.$ $$\_\_\_\_\_\_\_\_\_$ b$.\_\_\_\_\_\_\_\_\_\%$

$2.$ What margin per unit does a distributor earn when selling to a retailer, assuming it follows ABC$$s pricing example?

a$.$ $$\_\_\_\_\_\_\_\_\_\_$ b$.\_\_\_\_\_\_\_\_\_\_\%$

$3.$ If the retailer sells a unit for $$24,$ what markup is being charged to the consumer?

a$.$ $ $\_\_\_\_\_\_\_\_\_\_\_$ b$.\_\_\_\_\_\_\_\_\_\_\_\_\_\%$

$4.$ The discount that ABC provided to the distributor off of the suggested retail price is known as a $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ discount.

$5.$ If ABC sells to distributors on a $2/10$ net $30$ basis, this discount is known as a $\_\_\_\_\_\_\_\_$ discount.

$6.$ According to the $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_,$ ABC must charge the same price to all customers $($with two exceptions$).$