Tessa isted to complete the efficiency ratio for her employer's new product line which formula should she use to make this calculation? Miele Choice correntes de by current eded by very coded by C by cost of good ryby our recevate 16 3 00 S 4 pa $ 5 6 & 7 Ta E R 8 - T 9 Y D U F 0 G H P { [ C J V K L B N M