Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Builder | Model | Length (ft) | Propulsion | Fleet series | Total | Notes |
| --- | --- | --- | --- | --- | --- | --- | --- |
| N/A | Ford | E450 | 25.0 | Diesel | S002-S056, S062-S102 | 92 | Commercial Body Builders Ltd Polar V body |
| N/A | Ford | E450 | 25.0 | Diesel | S057-S061 | 5 | Champion CH-251FL body |
| N/A | GMC | C5500 | 25.0 | Diesel | S200-S236 | 37 | El Dorado Aero Elite body |
| N/A | GMC | C5500 | 25.0 | Diesel | S237-S374 | 148 | El Dorado Aero Elite body |
| N/A | International | AC Series | 25.0 | Diesel | S410-S434 | 24 in service, more being readied | IC Bus AC Series body |
Question:
How many international builders are there?
Answer:
24 in service, more being readied