Based on the table provided, Is the company efficient or productive for the entire period of 31 days or one month taken? Please explain which days are not productive and why?

Period Number of pizza ordered Sale price per pizza ($) Labor employed ($/hr) Overhead, variable and Efficiency other costs ($) Day 1 107 14 1230 1232 0.61 Day 2 218 14 1130 1211 1.30 Day 3 197 13 1066 2000 0.84 Day 4 213 17 1101 1987 1.17 Day 5 232 22 1003 1287 223 Day 6 217 16 1157 1898 114 Day 7 207 20 1157 1671 1.46 Day 8 222 23 1153 1379 2.02 Day 9 223 16 984 2199 1.12 Day 10 275 29 1131 3072 1.90 Day 11 208 20 1126 2260 1.23 Day 12 210 21 1080 2527 1.22 Day 13 222 17 1155 2256 1.11 Day 14 207 17 1052 1419 1.42 Day 15 247 43 1042 2821 2.75 Day 16 217 19 981 3971 0.83 Day 17 215 21 1053 2361 1.32 Day 18 217 22 1163 2597 1.27 Day 19 216 17 1141 3094 0.87 Day 20 282 27 1010 2594 2.11 Day 21 205 23 1069 3129 1.12 Day 22 198 23 1131 4694 0.78 Day 23 205 20 1173 3139 0.95 Day 24 214 18 1072 3625 0.82 Day 25 274 35 1097 3425 2.12 Day 26 204 15 1154 3213 0.70 Day 27 216 20 1071 3447 0.96 Day 28 219 23 1197 5850 0.71 Day 29 217 19 1102 3329 0.93 Day 30 299 12 1130 3906 0.71 Day 31 231 66 1143 3676 3.16 1.32 TOTAL EFFICIENCY