An order entry team is entering four different fields when an order is called in: customer name, address, model number, and credit card. Analyzing the data after $1,000$ orders are taken resulted in the information in Table $7\mathrm{.}1.$

Table $7\mathrm{.}1$: Results from analysing $1000$ customer orders

Orders

Customer name incorrect

Customer address incorrect

Model number incorrect

Credit card incorrect

Total defects

$960$

$0$

$20$

x

x

$40$

$10$

x

$10$

$8$

x

$8$

$2$

x

$2$

$1000$ orders

$60$ defects

Calculate the defects per million opportunities $($DPMO$)$ for the order entry team.

DPMO$=$